2 sentences

1. 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

2. 这些微小的水滴在叶尖上积聚成了一颗巨大的水珠。

   zhè​xiē wēi​xiǎo de shuǐ​dī zài yè jiān shàng jī​jù chéng le yī kē jù​dà de shuǐ​zhū.

   These tiny droplets gathered into a large drop of water at the tip of the leaf.

   Source: Dong Chinese Dictionary