L3-U3-P1-1 Listening : Life & Conditions 1生活和条件
There are many forms of life on Earth, including human beings. 地球上有许多生命形式，包括人类。
Life exists in a variety of conditions. 生命存在于各种各样的环境中。
Some forms of life live in a watery environment, like the oceans. 有些生命形式生活在水环境中，如海洋。
Other forms of life can be found in very dry areas like deserts. 其他形式的生命可以在非常干燥的地区，如沙漠中找到。
However, for any form of life to exist, conditions must be right. 然而，任何形式的生命存在，都必须有合适的条件。
When conditions are not right, that form of life will become extinct. 当条件不合适时，那种生命形式就会灭绝。
To become extinct means to die out completely. 灭绝意味着完全灭绝。
Conditions must be right for life to exist. 生命必须有适宜的生存条件。
Millions of years ago there were forms of life that no longer exist.数百万年前，一些生命形式已经不复存在。
When conditions changed, these forms of life dead out. 当条件改变时，这些生物就会灭绝。
One extinction event happened about 250 million years ago. 一次灭绝事件发生在大约2亿5千万年前。
This was the largest extinction event of all time.这是有史以来最大的灭绝事件。
Many forms of life became extinct. 许多生命形式已经灭绝。
96% of all life in the oceans died out. 96%的海洋生物都灭绝了。
Most insects also became extinct. 大多数昆虫也灭绝了。
This event happened over a period of several million years.这一事件发生了几百万年。
The causes of this extinction event are still unknown. 这一灭绝事件的原因仍然未知。
Possible causes include large volcanic eruptions and global warming. 可能的原因包括大规模的火山爆发和全球变暖。
Some scientists believe that there were several causes. 一些科学家认为有几个原因。
They believe that a series of events caused the extinctions. 他们认为一系列的事件导致了物种灭绝。
Scientists are working to better understand what really happened. 科学家们正在努力更好地了解到底发生了什么。
L3-U3-P1-2 Listening : Life &Conditions 2
In modern times we humans face changing conditions. 在现代，我们人类面临着不断变化的环境。
For humans to live, we need clean air and clean water. 为了人类的生存，我们需要干净的空气和干净的水。
Pollution is now a growing problem around the world. 污染现在是世界上一个日益严重的问题。
Pollution poisons the air and water that we depend on. 污染毒害了我们赖以生存的空气和水。
Polluted air makes people sick and afraid to go outside. 污染的空气使人们生病，不敢出门。
Polluted water poisons our food supply. 受污染的水污染了我们的食物供应。
As a result, we never know which foods are safe to eat. 因此，我们永远不知道哪些食物是安全的。
Human beings cannot live in a poisoned environment. 人类不能生活在有毒的环境中。
Therefore, pollution is a major threat to our existence. 因此，污染是对我们生存的主要威胁。
Humans need temperatures to be in a comfortable range. 人类需要温度在一个舒适的范围内。
To be in a comfortable range means to be neither too hot nor too cold. 在一个舒适的范围内是指既不太热也不太冷。
With global warming, global temperatures are rising. 随着全球变暖，全球气温正在上升。
As temperatures rise, the polar icecaps will melt. 随着气温上升，极地冰盖将融化。
As the polar icecaps melt, ocean levels will rise. 随着极地冰盖的融化，海平面将上升。
Areas of some countries will soon be under water. 一些国家的地区很快就会被淹没。
People will be forced to relocate from flooded areas. 人们将被迫从水灾地区搬迁。
In nature, even small changes can sometimes have large effects. 在自然界中，即使是很小的变化有时也会产生很大的影响。
It’s difficult to predict what’s going to happen. 很难预测会发生什么。
The entire ecosystem that we depend on is changing. 我们赖以生存的整个生态系统正在发生变化。
Some of these changes are irreversible. 其中一些变化是不可逆转的。
Irreversible changes cannot be undone. 无法撤消不可逆的更改。
Let’s hope that humans are smart enough to understand how
the world is changing. 让我们希望人类足够聪明，能够理解世界是如何变化的。
With more understanding, we can make better choices about what to do. 有了更多的理解，我们就可以做出更好的选择做什么。
We can face the challenges of pollution and global warming.我们可以面对污染和全球变暖的挑战。
We need to do this before it’s too late. 我们得趁现在还来得及。
This planet Earth is our only home and we need to protect it. 地球是我们唯一的家园，我们需要保护它。
L3-U3-P1-3 Vocabulary : Forms of Life生命形式
Mammals are covered by hair or fur, have a backbone and warm-blooded. 哺乳动物被毛发或皮毛覆盖，有脊椎和温血动物。
All female mammals produce milk for their young. 所有的雌性哺乳动物都为幼崽产奶。
Reptiles are covered by scales and include snakes, lizards and turtles. 爬行动物身上覆盖着鳞片，包括蛇、蜥蜴和乌龟。
Reptiles have a backbone and are cold-blooded, which means they often rely on the external sources of heat. 爬行动物有脊椎，是冷血动物，这意味着它们经常依赖外部热源。
Birds are covered by feathers and are warm-blooded. 鸟类全身有羽毛，是温血动物。
Most birds can fly and many types of birds migrate great distances. 大多数鸟类会飞，而且许多鸟类迁徙距离很远。
Most insects such as ants and bees have a small, 3-part
body with 3 pairs of legs. 大多数昆虫，如蚂蚁和蜜蜂，有一个小的，三部分的身体和三对腿。
Some insects, like mosquitoes, spread diseases that cause the deaths of many humans. 一些昆虫，如蚊子，传播导致许多人死亡的疾病。
Unlike animals, plants get the energy that they need from the sun. 与动物不同的是，植物从太阳那里获得它们所需要的能量。
Plants convert light energy, along with carbon-dioxide and water, into chemical energy. 植物将光能、二氧化碳和水转化为化学能。
L3-U3-P1-4 Vocabulary : Instruments仪器
Scales and rulers are used to measure weight and length. 天平和尺子用来测量重量和长度。
Units of weight include kilograms and pounds, and units of length include centimeters and inches. 重量单位包括公斤和磅，长度单位包括厘米和英寸。
These instruments are used to observe very large and very small objects. 这些仪器用来观察非常大和非常小的物体。
Telescopes are used by astronomers, and microscopes are used by biologists and doctors. 天文学家使用望远镜，生物学家和医生使用显微镜。
These appliances are used in the kitchens of almost every home. 这些电器几乎家家户户的厨房都在使用。
Stoves are used to heat food, and refrigerators are used to keep foods cool or cold. 炉子用来加热食物，冰箱用来保持食物低温。
Household tools like these, are used to build and repair things. 像这样的家用工具，是用来建造和修理东西的。
Hammers are used to pound in nails and screwdrivers are used to turn a screw. 锤子用来敲钉子，螺丝刀用来转动螺丝。
L3-U3-P1-5 Dialogue : Dating Anniversary 约会周年纪念日
W: Do you know what day it is today? 你知道今天是星期几吗？
M: What do you mean? 你什么意思？Is it a special day?今天特别吗？
W: Oh, so you don’t remember. 哦，所以你不记得了。
M: Remember what? 记得什么？What’s so special? 有什么特别的？
W: It’s our anniversary. 天是我们的周年纪念日。
We started dating a year ago today. 今我们一年前的今天开始约会。
M: Oh, really? Sorry! 哦,是吗? 对不起!
M: Just a minute. 等一下。What do you
think this is? 你觉得这是什么?
W: Oh, it’s a necklace. 哦，是条项链。
M: Do you like it? 你喜欢吗？
W: Yes, I do. 是的,我喜欢。
It’s lovely, especially the red heart. 它很可爱，尤其是那颗红心。
May I put it on? 我可以戴上吗?
M: No, let me do it. 不，让我来。
W: So you did remember. 这么说你记得了。
M: Of course I remember it. 我当然记得。
It’s a very special day for both of us. 这对我们俩来说都是非常特别的一天。
W: I have something for you too. 我也有东西要给你。
M: You do? 是吗？
W: Yes, but it will have to wait until later. 是的，但是得等一会儿。
M: Oh, I can’t wait. 哦，我都等不及了。Tell me what it is.告诉我是什么。
W: Can you guess what it is? 你能猜到是什么吗?
M: Could you give me a hint? 你能给我个提示吗?
W: We went there six months ago. 我们六个月前去过那里。
M: Oh, you mean Alfredos. 哦，你是说阿尔弗雷多斯。
W: Yes, aren’t you excited? 是的，你不兴奋吗？
You said you really like the food there.你说你很喜欢那里的食物。
M: Yes, that’s true. 是的,没错。
I also remember their dessert, do you? 我还记得他们的甜点，你记得吗?
W: Yes, but let’s not talk about that now. 是的，但我们现在先别谈这个。
Let’s not ruin the surprise.我们不要破坏这个惊喜。
L3-U3-P1-6 Dialogue : Fine Dining美食
W: That restaurant looks nice. 那家餐馆看起来不错。
M: Yes, but it looks expensive. 是的，但是看起来很贵。
W: Let’s go in and look at the menu. 我们进去看看菜单吧。
W: Wow, the menu looks great, especially the fish. 哇，菜单看起来真棒，尤其是鱼。
(She likes the choices especially the fish.) 她喜欢食物的选择，尤其是鱼。
M: Yes, it looks good, but look at those prices. 是的，看起来不错，但是看看那些价格。
M: Let’s try somewhere else. 我们去别的地方试试吧。
W: Sometimes it’s okay to spend a little money. 有时候花点钱也没关系。
M: Yes, but these prices are bit too high, don’t you think? 是的，但是这些价格有点太高了，你不觉得吗？
W: Yes, they are a bit high. 是的，有点高。
But don’t you think I’m worth it? 但你不觉得我值得吗？
Let’s enjoy ourselves. 让我们尽情享受吧。
M: OK, if you put it that way. 好吧，如果你这么说的话。
Let’s see if we can get a table.我们看看能不能订到位子。
W: I’m glad you have your credit card. 我很高兴你有信用卡。
I sure hope the food is good. 我真希望食物好吃
W: Stop worrying. 别担心了。Let’s just enjoy.让我们享受一下.
L3-U2-P1-7 Listening
L3-U2-P1-8 Vocabulary
L3-U2-P1-9 Speaking