1.
It is sometimes hot and sometimes cold.
天气时热时冷。The
2.
Eat lots of hot food when it is cold.
天气寒冷的时候，多吃点热食。
3.
I will cover it when the weather is cold.
天气冷时我将它盖起来。
4.
Water turns into ice when it freezes.
天气极冷时水能结成冰.
5.
A gas is cooled by expansion and heated by compression.
气体膨胀时冷却，压缩时变热。
6.
In scorching summer it's very sultry.
酷夏时天气非常闷热。
7.
We sweat when it is very hot.
天气热时我们会出汗。
8.
In the late spring it's getting hot.
暮春时节天气变热。
9.
Sometimes the weather is sunny and hot.
有时候天气很睛朗，很热。
10.
Gramophone records warp in very hot weather.
天气太热时,唱片会弯翘。
11.
Spring has been playing Box and Cox with winter for months past.
前几个月，天气冷暖交替，有时像春天，有时像冬天。
12.
You catch a cold in summer when the air is not cold.
在夏天，天气不冷时，你也会感冒。
13.
"A cold front is formed when cold air moves into an area of warm air. The cold air forces the warm air to rise, and cumulus clouds are formed. "
冷锋是冷空气进入时热空气的范围时所形成的。 冷空气迫使热空气上升而形成层云
14.
This building material stays cool even in the hottest weather.
这种建筑材料在天气最热时也不发热。
15.
It is often cold in November and it rains sometimes.
到11月天气常常是冷的，而且有时下雨。
16.
In cold weather you should wrap up well.
天气寒冷时,你应该穿得暖和些。
17.
It's prudent to wear a thick coat when the weather is cold.
天气冷时穿上件厚外套是谨慎的。
18.
On the coldest nights Babbitt luxuriously gave up the duty of being manly.
天气最冷时，巴比特也不充好汉了。