視頻簡介：NASA科學家從太空的角度，分析并對比了北京，洛杉磯和亞特蘭大三地的空氣質量，什么是霧霾?為什么中國空氣污染這么嚴重?以及美國空氣污染的歷史，解決辦法，以及現狀。

1. The smog is severe!

霧霾太嚴重了!

2. When the pollution gets really serious, I can't even see the buildings next to me.

霧霾太嚴重了，附近的建筑都看不清了。

3. I'm very concerned about my son's health. If the air pollution stays like this, he won't ever be able to leave the house.

我很擔心我兒子的健康。如果空氣質量一直這么差的話，他就不能去外面玩。

4. You've got to drink a lot of fluids.

你應該多喝水。

5. Strong cold air is in the forecast to blow away the smog.

天氣預報說有強冷空氣要來吹散霧霾了。

6. The weather forecast warned of winds of up to 60-miles-an-hour tomorrow.

天氣預報說明天有時速高達60英里的大風。

其他相關天氣表達：

1. It hasn't rained a drop for months!

好幾個月沒下雨了!

2. The heat is unbearable!

太熱了!

3. It's raining cats and dogs today.

今天下了好大的雨。

4. The drought conditions are severe!

天氣太旱了!

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