Level3.Unit3 PART1
Learning: Life & Conditions 1
There many forms of life on earth including human beings.
Life exists存在 in a variety of conditions. 生命存在于各种各样的环境中。
Some forms of life live in watery含水的，水分多的 environment like the oceans.
Other forms of life can be found in very dry areas like deserts.
However, for any form of life to exist conditions环境 must be right.
When conditions it is not right, that forms of life will become extinct.灭绝
To become extinct means to die out completely.完全的
Conditions must be right for life to exist.
Millions of years ago there were forms of life that no longer exist. 数百万年前，生命形式已经不复存在。
When conditions changed these forms of life died out.
One extinction event happened about 250 million years ago.
This was the largest extinction event of all time. 这是有史以来最大的灭绝事件。
Many of forms of life became extinct.
Ninety-six percent of all life in the oceans died out.
Most insects昆虫 also become extinct.
This event happened over a period of一段时间 several million years.
The causes of this extinction event are still unknown.
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.
They believe that a series of events caused the extinctions.
Scientists are working to better understand what really happened.
Learning: 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.
Pollution is now a growing problem around the world.
Pollution poisons污染 the air and water that we depend on.
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.
As a result, we never know which food to safe to eat.
Human beings cannot live in poisoned environment.
Therefore, pollution is a major threat威胁; 恐吓; 凶兆 to our existence. 因此，污染是我们生存的主要威胁。
Polluted water poisons our food supply.
Humans need temperatures to be in a comfortable range.
To be in comfortable range means to be neither hot nor too cold.
With global warming global temperature is arising.
As temperatures rise, the polar icecaps will melt.
As polar icecap melt oceans levels will rise. 随着极地冰盖融化，海平面将上升。
Areas of some countries will soon be under water.
People will be forced to relocate迁移 from flooded被水淹的 areas. 人们将被迫从受灾地区搬迁。
In nature, even small changes can sometimes have large effects.影响
It’s difficult to predict what’s going to happen.
The entire ecosystem整个生态系统 that we depend on is changing.
Some of these changes are irreversible.
Irreversible changes cannot be undone. undone已解开的; 未做的; 烦乱的; 毁了的; 解开; 毁灭; 松开( undo的过去分词 句译：无法撤消不可逆的更改。
Because they cannot be reversed.
Let’s hope the humans are smart after understand what world is changing.
With more understanding we can make better choices about what to do.
We can face challenge of pollutions about global warming.
We need to do this before it’s too late.
This planet earth is only home and we need to protect it.
We need to protect the environment that supports us.
Vocabulary: Forms of life
Mammals are covered by hair or fur, have a backbone and warm-blooded. 哺乳动物被毛发覆盖，有脊骨和温血。
All female mammals produce milk for their young.
Reptiles are covered by scales and include snakes, lizards and turtles. 爬行动物被鳞片覆盖，包括蛇、蜥蜴和海龟。
Reptiles have a backbone and cold-blooded which means they often rely on the external resources of heat. 外部热资源。
Birds are covered by feathers羽毛 and are warm blooded.
Most birds can fly and many types of birds migrate迁移 great distances.
Most insects such as ants and bees have a small 3 parts body with 3 pairs of legs.
Some insects, like mosquitoes spread diseases that cause the deaths of many humans. 一些昆虫，如蚊子传播疾病，导致许多人死亡。
Unlike animals，plants get the energy that they need from the Sun.
Plants convert light energy，along with carbon-dioxide and water, into chemical energy. 植物将光能连同二氧化碳和水一起转化为化学能。
Mammals include some of the most intelligent animals on Earth, such as elephants and human beings.
Mosquitoes calls the deaths of more humans than any other animals.
Most mammals live on land but some live in the sea.
Vocabulary: Instruments
Scales and rulers are used to measure weight and length.
Units of weight includes kilograms and pounds and units of length includes centimeters and inches.
These instruments are used to observe very large and very small objects.目标，物体
We can use a telescope to see objects that are far away.
Rules are used to measure length.
Telescopes are used by astronomers and microscopes are used by biologists and doctors.
These appliances are used in the kitchens of almost every home.
Stoves are used to heat food and refrigerators are used to keep foods cool or cold.
Household tools like these, are used to build and repair things.
Hammers are used to pound in the nails and screwdrivers are used to turn a screw.
These instruments are used to observe very large and very small objects.
Telescopes are used by astronomers. And microscopes are used by microbiologist and doctors.
These appliances are used in the kitchens of almost every home.
Stoves are used to heat food and refrigerators are used to keep foods cool or cold.
Household tools like these are used to build and repair things.
If you need to pound in a nail use a hammer.
2 inches is a little more than 5 centimeters.
Dialogue: Dating Anniversary
G: Do you know what day it is today?
B: What do you mean? Is it a special day?
G: Oh see you don’t remember.
B: Remember what? What’s the special.
G: It’s our anniversary. We start dating a year ago today.
B: Oh really? I am sorry. Just a minute. What you think this is.
G: Oh, it’s a necklace.
B: Do you like it?
G: Yes, I do. It’s lovely. Especially the red heart. May I put it on?
B: No let me do it.
G: So you did remember.
B: Of course I remember. It’s a very special day for both of us.
G: I have something for you too.
B: You do?
G: Yes, but it was a half wait and later.
B: Oh I can't wait. Tell me what it is.
G: Can you guess what it is?
B: Could you give me a head?
G: We went there 6 months ago.
B: Oh you mean know ？
G: Yes, are you excited.
G: You said you really liked the foods there.
B: Yes, that’s true. I also remember the dessert, do you
G: Yes but let not talk about that now.
Let’s not ruin the surprise. 我们不要破坏惊喜。
Dialogue: Fine Dining
That restaurants looks nice.
Let's go in and look at the menu.
Yes, but it looks expensive
Wow the menu looks great, especially the fish.
Yes, it looks good, but look at those prices.
Let's try someone else.
Sometime it's okay to spend a little money.
Yes, but this prices are bit too high. Don’t you think?
Yes, they are a bit high. But don't you think I am worse it. Let's enjoy ourselves.
Ok if you put that way. Let’s see if we can get the table.
I’m glad you have credit card.
I sure hope the food is good.
Stop worrying. Let’ just enjoy.
these翻译为这些，是this的复数形式（距离也较进）。
those翻译为那些，是that的复数形式（距离比较远）。