5 sentences

1. 他习惯用冷水洗脸。

   tā xí​guàn yòng lěng​shuǐ xǐ​liǎn.

   He is used to washing his face with cold water.

   Source: Dong Chinese Dictionary

2. 用冷水给他洗一洗。

   yòng lěng​shuǐ gěi tā xǐ yī xǐ.

   Wash him with cold water.

   Source: OpenSubtitles

3. 西瓜要在冷水里镇一下才好吃。

   xī​guā yào zài lěng​shuǐ lǐ zhèn yī​xià cái hǎo​chī.

   Watermelon tastes better after being chilled in cold water.

   Source: Dong Chinese Dictionary

4. 他往脸上撩了一些冷水，让自己清醒一点。

   tā wǎng liǎn shàng liāo le yī​xiē lěng​shuǐ, ràng zì​jǐ qīng​xǐng yī​diǎn.

   He splashed some cold water on his face to wake himself up.

   Source: Dong Chinese Dictionary

5. 他正兴致勃勃地计划旅行，你别给他泼冷水。

   tā zhèng xìng​zhì​bó​bó de jì​huà lǚ​xíng, nǐ bié gěi tā pō lěng​shuǐ.

   He is enthusiastically planning a trip, so don't dampen his spirits.

   Source: Dong Chinese Dictionary