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1·Steam condenses into water when it cools.

蒸汽冷却时凝结为水。《牛津词典》

2·When this mixture cools, the result is of course glass.

混合物冷却后，其成果当然是玻璃了。

3·Then it snows because as the air rises, it cools off and loses its capacity to hold water vapor.

然后就会下雪，因为当空气上升时，它就会冷却并失去保持水蒸气的能力。

4·The physicist Fabian reasoned that as intergalactic gas cools, the cooler gas shrinks inward toward the center of the galaxy.

物理学家费边推断，当星系间的气体冷却时，较冷的气体向星系中心收缩。

5·The Romans observed that, when volcanic ash mixes with water and then cools, it gets extremely hard and almost impossible to break up.

罗马人观察到，当火山灰与水混合然后冷却，火山灰变得非常坚硬，几乎不可能分解。

6·Meanwhile, its place is taken by hotter intergalactic gas from farther out on the edge of the galaxy, which cools as it is compressed and flows into the galaxy.

与此同时，它的位置被更热的星系间气体所取代，这些气体来自更远的星系边缘，在被压缩的过程中冷却并流入星系。

7·Glass contracts as it cools.

玻璃遇冷收缩。《牛津词典》

8·The lotion cools and refreshes the skin.

润肤液使皮肤凉爽清新。《柯林斯英汉双解大词典》

9·Perspiration cools the skin in hot weather.

热天出汗可使皮肤降温。《牛津词典》

10·He cools himself in front of an electric fan.

他在一个电扇前面吹凉。《柯林斯英汉双解大词典》

(1)stay cool保持冷静

(1)so cool真酷

(1)cool down冷却；平静下来

(1)cool off变凉；平静下来

(1)cool breeze凉爽的微风

(1)play it cool抑制住感情，沉着冷静