3 sentences

1. 雨滴是在云层中凝结生成的。

   yǔ​dī shì zài yún​céng zhōng níng​jié shēng​chéng de.

   Raindrops are formed by condensation in the clouds.

   Source: Dong Chinese Dictionary

2. 空气中的水蒸气遇冷凝结成小水珠。

   kōng​qì zhōng de shuǐ​zhēng​qì yù lěng níng​jié chéng xiǎo shuǐ​zhū.

   Water vapor in the air condenses into small droplets when it cools.

   Source: Dong Chinese Dictionary

3. 伤口流出的血液很快就凝结了。

   shāng​kǒu liú​chū de xuè​yè hěn kuài jiù níng​jié le.

   The blood flowing from the wound soon coagulated.

   Source: Dong Chinese Dictionary