听力

Listening

Life & Conditions 1

生活与条件1

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条件中。

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.

在非常干燥的地区，如沙漠，也可以找到其他的生命形式。

However, for any form of life to exist, conditions must be right.

然而，任何形式的生命存在，条件必须是正确的。

When conditions are not right, that form of life will become extinct.

如果条件不合适，这种形式的生命就会灭绝。

To become extinct means to die out completely.

灭绝意味着完全消失。

Conditions must be right for life to exist.

生存的条件必须是正确的。

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.

当条件改变时，这些生命形式就消失了。

One extinction event happened about 250 million years ago.

大约2.5亿年前发生了一次灭绝事件。

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.

许多生命形式都灭绝了。

Ninety six percent of all life in the oceans died out.

海洋中96%的生物灭绝了。

Most insects also became extinct.

大多数昆虫也灭绝了。

This event happened over a period of several million years.

这件事发生在几百万年的时间里。

The causes of this extinction event are still unknown.

这次灭绝事件的原因仍不清楚。

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。

听力

Listening

Life & Conditions2

生活与条件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，我们需要清洁的空气和水。

Pollution is now a growing problem around the world.

污染现在是世界各地日益严重的问题。

Pollution poisons the air and water that we depend on.

污染毒害着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，污染是我们生存的主要威胁。

Humans need temperatures to be in a comfortable range.

人类需要温度保持在一个舒适的范围内。

To be in a comfortable range means to be neither too hot nor too cold.

在舒适的范围内意味着既不太热也不太冷。

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.

随着温度的升高，极地冰盖会融化。

As the polar icecaps melt, ocean 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.

一些国家的地区很快就会被淹没。

People will be forced to relocate from flooded areas.

人们将被迫从受灾地区搬迁。

In nature, even small changes can sometimes have large effects.

在自然界中，即使是微小的变化有时也会产生巨大的影响。

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.

我们所依赖的整个生态系统正在改变。

Some of these changes are irreversible.

其中一些变化是不可逆的。

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。

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.

我们需要在为时已晚之前完成这项工作。

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。

词汇

Vocabulary

Forms of life

生命形式

Mammals are covered by hair or fur, have a backbone and are warm-blooded.

哺乳动物被毛或毛皮覆盖，有脊骨，是温血动物。

All female mammals produce milk for their young.

所有的雌性哺乳动物都为它们的幼崽产奶。

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 are cold-blooded, which means they often rely on external sources of heat.

爬行动物有脊骨，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.

鸟身上覆盖着羽毛，是温血的。

Most birds can fly and many types of birds migrate great distances.

大多数鸟能飞，许多种类的鸟能远距离迁徙。

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，都有一个三部分的小身体，有三对腿。

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，植物从阳光中获取所需的能量。

Plants convert light energy, along with carbon-dioxide and water, into chemical energy.

植物将光能以及二氧化碳和水转化为化学能。

词汇

Vocabulary

Instruments

仪器

Scales and rulers are used to measure weight and length.

秤和尺用来测量重量和长度。

Units of weight include kilograms and pounds, and units of length include centimeters and inches.

重量单位包括千克和磅，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.

几乎每个家庭的厨房都使用这些电器。

Stoves are used to heat food, and refrigerators are used to keep foods cool or cold.

炉子用来加热食物，冰箱用来保持食物的凉或冷。

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 scow.

锤子用来敲钉子，螺丝刀用来转动船头。

对话

Dialogue

Dating Anniversary

约会周年纪念

W：do you know what day it is today?

W：你知道今天是几号吗？

M：what do you mean ?Is it a special day?

M：什么意思？这是个特殊的日子吗？

W：oh, so you don’t remember.

W：哦，所以你不记得了。

M：remember what? What’s so special?

M：还记得吗？有什么特别的？

W：it’s our anniversary. We started dating a year ago today.

W：今天是我们的周年纪念日。一年前的今天我们开始约会。

M：oh, really, I’m sorry.

M：哦，真的，对不起。

M：just a minute. What do you think this is?

M：等一下。你觉得这是什么？

W: oh, it’s a necklace.

W：哦，这是一条项链。

M：do you like it?

M：你喜欢吗？

W：yes, I do. It’s lovely, especially the red heart. May I put it on?

W：是的，我喜欢。很可爱，尤其是红心。我可以戴上吗？

M：no, let me do it.

M：可以，让我来戴。

W：so you did remember.

W：所以你记得了。

M: of course I remembered. It’s a very special day for both of us.

M：我当然记得了。对我们俩来说这是一个非常特别的日子。

W: I have something for you too.

W：我也有东西给你。

M：you do?

M：是吗？

W：yes, but it will have to wait until later.

W：是的，但是要等一会儿。

M：oh, I can’t wait. Tell me what it is.

M：哦，我等不及了。告诉我是什么。

W：can you guess what it is?

W：你能猜出是什么吗？

M：could you give me a hint?

M：你能给我个提示吗？

W：we went there six month ago.

W：我们六个月前去过那里。

M：oh, you mean Alfredo’s.

M：哦，你是说Alfredo。

W：yes, are you excited? You said you really like the food there.

W：是的，你兴奋吗？你说你很喜欢那里的食物。

M：yes, that’s true.I also remember the dessert. Do you?

M：是的，没错。我还记得甜点。你呢？

W：yes, but let’s not talk about that now. Let’s now ruin the surprise.

W：是的，但现在我们不要谈这个了。现在让我们破坏惊喜吧。

对话

Dialogue

Fine Dining

美食

W：That restaurant looks nice.

W：那家餐馆看起来不错。

M：Yes, but it looks expensive.

M：是的，但是看起来很贵。

W：Let’s go in and look at the menu. Wow the menu looks great, especially the fish.

W：我们进去看看菜单吧。哇，菜单看起来不错，尤其是鱼。

M：Yes, it looks good, but look at those prices.Let’s try somewhere else.

M：是的，看起来不错，但是看看那些价格。我们到别的地方试试。

W：Sometimes it’s ok to spend a little money.

W：有时候花点钱也可以。

M：Yes, but these prices are a bit too high, don’t you think?

M：是的，但是这些价格有点太高了，你不觉得吗？

W：Yes, there are a bit high. But don’t you think I’m worth it? Let’s enjoy ourselves.

W：是的，有点高。但你不认为值得吗？让我们尽情享受吧。

M: Ah, ok, if you put it that way. Let’s see if we can get a table.

M：啊，好吧，如果你这么说的话。我们看看能不能订张桌子。

W：I’m glad you have your credit card.

W：很高兴你有信用卡。

M：I sure hope the food is good.

M：我当然希望这菜好吃。

W：Stop worrying. Let’s just enjoy.

W：别担心了。让我们尽情享受吧。