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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·There the air absorbs more moisture, which then condenses on a metal wall cooled by seawater, and thus distilled water for irrigating the plants collects.

在那里，空气吸收了更多的水分，然后将水分凝结在由海水冷却的金属壁上，从而收集用于灌溉植物的蒸馏水。

3·Water vapour condenses to form clouds.

水蒸汽冷凝形成云。《柯林斯英汉双解大词典》

4·Steam condenses into drops of water.

水蒸气凝成了小水滴。《新英汉大辞典》

5·Steam condenses to water when it touches a cold surface.

水蒸气触及冷的表面即凝结成水。《新英汉大辞典》

6·And, when atmospheric methane condenses, it makes fog.

当大气中的甲烷凝结就形成了雾。

7·Steam condenses into water when it touched a cold surface.

水蒸汽接触冷的表面时，即凝结成水。

8·As the hot steam condenses on the edges, it refreezes and forms icicles.

而高温蒸汽亦会在边缘处凝结，从而形成冰柱。

9·The steam then condenses and reduces pressure in the reactor system.

蒸汽压缩之后反应堆系统的压力就会降低。

10·As the vapor condenses into rain, the local atmospheric pressure drops.

当水汽凝成雨水，会造成局域性的大气压力下降。

(1)condense into把…缩短；把…压缩