撒哈拉沙漠

When the wind kicks up in the Sahara desert,

当风吹过撒哈拉大沙漠的时候

huge volumes of dust, rich in minerals,

蕴含丰富营养物质和矿物质的砂粒和粉尘

are lifted into the air to be blown out across the Atlantic.

被扬到空气中并被吹过大西洋

Here, much of it falls into the sea.

大部分都落进了海洋

But some is carried on the wind all the way across the Atlantic

但还有一些被风带到了大西洋的彼岸

to the Amazon rainforest of South America.

到了南美的亚马逊雨林

In fact, a staggering 40 million tons of dust

实际上，每年都有4亿吨粉尘

is transported from the Sahara to the Amazon every year.

被风从撒哈拉大沙漠带到亚马逊雨林

Here, the rain washes it out of the atmosphere

在这，雨水把大气中的

and onto the forests below,

粉尘冲刷到雨林中

where it's a vital source of minerals that keep the rainforest healthy.

这是维持雨林正常生长的重要的营养源

In this way, the constantly swirling atmosphere

通过这种方式，不断翻卷的大气层

plays a critical role in the cycle of life on Earth.

对地球上生命的循环起着重要的作用

It creates the weather.

它创造了气候

At the heart of all weather is heat.

任何气候的核心都是热量

This is three months of weather packed into just a few seconds.

这是在几秒里显示了三个月的天气状况

The clouds are generated by moisture from the oceans and the land.

云是由从海洋和大陆上蒸发的水分产生的

重点讲解

1、kick up

开始（大吵大闹）

Those customers who have kicked up a fuss have received refunds.

那些大吵大闹的顾客得到了退款。

They kick up a rumpus and throw things at each other.

他们吵了起来并互相朝对方扔东西。

扬起（灰尘或土）

She shuffled along, kicking up clouds of dust.

她拖着脚走路，带起一团团灰。

2、stagger

蹒跚;摇晃地走

He lost his balance, staggered back against the rail and toppled over.

他失去平衡，往后趔趄了一下，撞到栏杆摔倒了。

He was staggering and had to lean on the bar.

他走路摇摇晃晃，不得不靠在吧台上。

勉强维持

Truman allowed him to stagger on for nearly another two years.

杜鲁门允许他又硬撑了近两年。

a government that staggered from crisis to crisis.

在一次又一次危机中勉强维持的政府

使(假期或工作时间)错开

During the past few years the government has staggered the summer vacation periods for students.

在过去几年里，政府将学生放暑假的时间相互错开。

3、constantly

持续不断的;重复的;一直存在的

She suggests that women are under constant pressure to be abnormally thin...

她暗示说女性总是处在保持身材异常瘦削的压力之下。

Inflation is a constant threat.

通货膨胀始终是个威胁。

恒定的;不变的

The average speed of the winds remained constant.

平均风速保持稳定。

恒定物;常数；常量；常项

In the world of fashion it sometimes seems that the only constant is ceaseless change...

在时装界，有时似乎唯一永恒不变的东西就是不断的变化。

Two significant constants have been found in a number of research studies.

若干研究已经发现了两个重要常量。