L3-U2-P1-1 Listening : States of Matter 物质状态
Matter is made of atoms and molecules. 物质是由原子和分子组成的。
Water, for example, is the H2O molecule. 例如，水就是H2O分子。
This means that a molecule of water have 3 atoms. 这意味着一个水分子有3个原子。
A water molecule has two hydrogen atoms and one oxygen atom. 水分子有两个氢原子和一个氧原子。
Substances like sugar have many atoms in their molecules. 像糖这样的物质分子中有许多原子。
A molecule of sugar has many atoms, including carbon, hydrogen and oxygen. 糖分子有许多原子，包括碳、氢和氧。
Matter is made of molecules, such as H2O, which is the water molecule. 物质是由分子组成的，比如水分子H2O。
Matter can be one of three states, solid, liquid or gas. 物质可以是三种状态之一，固体、液体或气体。
Water and ice are the same substance, but they are in different states. 水和冰是同一种物质，但它们处于不同的状态。
These states depend on the temperature of the molecules. 这些状态取决于分子的温度。
When we heat a substance, the molecules move faster and try to take up more space. 当我们加热一种物质时，分子移动得更快，并试图占据更多的空间。
When we cool a substance, the molecules move more slowly. 当我们冷却一种物质时，分子移动得更慢。
When we cool a substance to its freezing point, it becomes
a solid. 当我们把物质冷却到冰点时，它就变成了固体。
In a solid, the molecules move very little. 在固体中，分子运动很小。
Their positions are almost fixed. 它们的位置几乎是固定的。
To be fixed means that their positions don’t change. 固定意味着它们的位置不变。
If we heat the molecules, they move faster and away from each other. 如果我们加热这些分子，它们会移动得更快，彼此远离。
The solid begins to melt, like ice cream on a hot day. 固体开始融化，就像大热天的冰淇淋。
At a certain temperature, a solid begins to change into a liquid. 在一定温度下，固体开始变成液体。
The temperature at which a solid changes into a liquid depends on the substance. 固体转变成液体的温度取决于物质。
For water, the solid begins to change into a liquid when
its temperature rises to about 0 degree Celsius. 对于水来说，当温度上升到0摄氏度左右时，固体开始变成液体。
For some substances, such as steel, the temperature at which it becomes a liquid is much higher. 对于某些物质，如钢，它变成液体的温度要高得多。
Steel often melts at around 1370 degrees Celsius. 钢通常在1370摄氏度左右熔化。
If we continue to heat a liquid, the molecules move even faster. 如果我们继续加热液体，分子移动得更快。
At a certain temperature, the liquid begins to change into a gas. 在一定温度下，液体开始变成气体。
For water, the liquid begins to change into a gas at 100 degrees Celsius. 对于水，液体在100摄氏度时开始变成气体。
That is the boiling point of water. 那是水的沸点。
Inside a star, such as our Sun, the temperature is very high. 在恒星内部，如太阳，温度很高。
Everything inside the Sun is a gas. 太阳内部的一切都是气体。
According to scientists, there are over 65 elements inside the Sun. 据科学家说，太阳内部有超过65种元素。
These include oxygen and iron. 其中包括氧气和铁。
Over 90 percent of the Sun is hydrogen gas. 太阳90%以上是氢气。
L3-U2-P1-2 Listening : Test Results 测试结果
Yesterday there was an important science test. 昨天有一个重要的科学考试。
Lisa, Tom and 20 other classmates took the test. 丽莎、汤姆和其他20位同学参加了考试。
The test was about the states of matter and how they are different. 这个测试是关于物质的状态以及它们之间的不同之处。
There were 25 questions on the test, and they had 45 minutes to take it. 考试共有25道题，他们有45分钟的时间。
Here are some of the test results. 以下是一些测试结果。
Two students got perfect scores. 两个学生得了满分。
The lowest score was 68 out of a hundred. 最低的分数是68分。
The average score was 86.3. 平均分是86.3分。
Eleven students scored higher than average. 11名学生的得分高于平均分。
Eleven students had below average scores. 11名学生的分数低于平均分。
Tom missed two questions on the test, so his score was 92. 汤姆考试漏了两道题，所以他的分数是92分。
His score was the eighth highest in the class. 他的分数是全班第八高的。
Lisa missed two and a half questions, so her score was 90. 丽莎漏了两道半题，所以她的分数是90分。
Her score was the tenth highest score. 她的分数是第十高分。
Her score was 4 points higher than the average score. 她的分数比平均分高4分。
Lisa was disappointed with her test results. 丽莎对她的测试结果很失望。
She studied hard for the test, but she still didn’t do well. 她为了考试而努力学习，但是她仍然没有取得好成绩。
As a result, she plans to study harder for the next test. 因此，她计划为了下一次考试而更加努力学习。
The next test will be in about two weeks. 下一次测试将在两周后进行。
Tom was surprised and happy with his test results. 汤姆对他的考试成绩既惊讶又高兴。
He didn’t study hard, so his result was better than he expected. 他没有努力学习，所以他的成绩比他预期的要好。
He was also happy that he did better than Lisa did. 他也很高兴他比丽莎做得好。
L3-U2-P1-3 Vocabulary : Emotions情绪
She is screaming because she is really scared. 她尖叫是因为她真的很害怕。
Something is chasing her, so she is screaming for help. 有东西在追她，所以她尖叫着求救。
He's shouting because he is angry. 他大喊大叫是因为他生气了。
When he's really angry, he often shouts like this. 他生气的时候，经常这样大喊大叫。
She's sleeping because she's tired. 她在睡觉，因为她累了。
Last night she didn’t get enough sleep, so today she has no energy. 昨晚她睡眠不足，所以今天她无精打采。
She’s crying because she’s sad. 她哭是因为她伤心。
She got some bad news a few minutes ago. 几分钟前她得到了一些坏消息。
She’s smiling because she’s happy. 她笑是因为她很高兴。
Her boyfriend just called and he is returning from a long trip. 她男朋友刚打电话来，他刚从长途旅行回来。
L3-U2-P1-4 Vocabulary : Hobbies兴趣爱好
This man is hiking up a mountain trail. 这个人正在爬山。
He is wearing hiking boots and is carrying a pack on hisback. 他穿着登山靴，背上背着背包。
This man enjoys cooking. 这个人喜欢烹饪。
He attends a cooking class once a week. 他每周上一次烹饪课。
This woman enjoys gardening. 这位妇女喜欢园艺。
She grows flowers, such as roses, and vegetables, such as
tomatoes in her garden. 她在花园里种了玫瑰之类的花，还种了西红柿之类的蔬菜。
This boy loves playing games. 这个男孩喜欢玩游戏。
He likes all kinds of games, including this video game on his computer. 他喜欢各种各样的游戏，包括电脑上的这个电子游戏。
This old couple enjoys traveling. 这对老夫妇喜欢旅游。
They take several trips a year, often to different countries. 他们一年有几次旅行，经常去不同的国家。
L3-U2-P1-5 Dialogue : Ready for the Meeting准备会议
W: Oh, there you are, finally. 哦，你终于来了。
M: Yeah, I’m sorry. 是的，对不起。
W: Why are you so late? 你怎么这么晚?
You were supposed to be here 30 minutes ago.你30分钟前就该来了。
M: I got on the wrong subway by mistake. 我上错了地铁。
W: Why didn’t you call? 你为什么不打电话?I
was really worried.我真的很担心。
M: I don’t have my phone. 我没带手机。
I left it in the office because I was in such a hurry to get here.我把它落在办公室了，因为我太着急了。
W: OK, well, you’re here now. 好吧，你现在来了。We don’t have much time.我们没有多少时间了。
M: Yes, we'll have to hurry. 是的，我们得快点了。
The meeting starts in 15 minutes, right? 会议还有15分钟就要开始了，对吧?
W: Yes, it's supposed to if everyone gets here on time. 是的，如果每个人都准时到的话。
W: Did you read my presentation? 你看过我的报告了吗？
M: Yes, I did. 是的，我看过。
It’s good，but it’s a bit too long. 报告很好，但是有点太长了。
I’m afraid there won’t be enough time for questions.我担心没有足够的时间提问。
W: Do you have any suggestions? 你有什么建议吗？
M: Yes, I do. 是的,我有。
I think the company introduction can be cut in half. 我认为公司介绍可以减半。
They know what we do. 他们知道我们是做什么的。
W: OK, I won’t show the video. 好吧，我就不放视频了。
It’s about 2 minutes long.大概有2分钟。
M: That’s a good idea. 这是个好主意。
The video was on our website and it’s not that good anyway.视频在我们的网站上，反正也没那么好。
W: Do you have any other suggestions? 你还有别的建议吗？
M: No, I don’t. 没有了。
I’m sure you'll do a great job. 我相信你会做得很好。
Are you ready? 你准备好了吗?
W: Yes, I’m ready. 是的,我准备好了。
The meeting room is on the 21st floor.会议室在21层。
M: OK. Let’s go. 好的，我们走吧。
L3-U2-P1-6 Dialogue : Discussing Test Results讨论测试结果
Lisa: How did you do on yesterday's science test? 昨天的科学考试你考得怎么样?
Tom: I did better than expected. 我考得比预期的好How about you?你呢？
Lisa: I didn’t do very well. 我考得不太好。
I expected to do better than I did. 我原以为会做得比实际的好。
Tom: What was your score? 你得了多少分？
Lisa: I got a 90. 我得了90分。What about you? 你呢？
Tom: I got a 92. 我得了92分。I only missed 2 questions.只漏了两个问题。
Lisa: So you did better than I did. 所以你考得比我好。
And I really studied for it too. 我也为此而努力了。
Tom: That is a surprise. 真是个意外。You usually do better than I do. 你通常比我考得好。
Lisa: Yes, I wasn't careful. 是的，我不小心。
I made one really stupid mistake.我犯了一个非常愚蠢的错误。
Tom: What was it? 是什么？
Lisa: I said 90% of the sun is Helium instead of hydrogen. 我说太阳的90%是氦而不是氢。
Tom: Wow, that was a stupid mistake. 那真是个愚蠢的错误。
Tom: What was the average score for the class? 班里的平均分数是多少?
Do you know? 你知道吗?
Lisa: The average score was 86.3 and the lowest was 68. 平均分86.3分，最低68分。
Tom: Do you know who got the lowest test score? 你知道谁的考试分数最低吗？
Lisa: No, I don’t. 我不知道。
I don’t know who got the lowest score. 我不知道谁的分数最低。
It’s probably a secret.这可能是个秘密。
Tom: Did anyone get a perfect score? 有人得了满分吗？
Lisa: I think Ada and Sanjay both got perfect scores. 我想艾达和桑杰都得了满分。
Tom: Yes, they always do well. 是的，他们总是考得很好。
I wish I were as smart as they are. 我希望我和他们一样聪明。
L3-U2-P1-7 listening
L3-U2-P1-8 Vocabulary
L3-U2-P1-9 Speaking