2 sentences

1. 重物咚的一声掉进了深水里。

   zhòng​wù dōng de yī shēng diào jìn le shēn​shuǐ lǐ.

   The heavy object fell into the deep water with a thud.

   Source: Dong Chinese Dictionary

2. 这条河的深水区很危险，禁止游泳。

   zhè tiáo hé de shēn​shuǐ qū hěn wēi​xiǎn, jìn​zhǐ yóu​yǒng.

   The deep-water area of this river is dangerous; swimming is prohibited.

   Source: Dong Chinese Dictionary