3 sentences

1. 他在跳水比赛中表现出色。

   tā zài tiào​shuǐ bǐ​sài zhōng biǎo​xiàn chū​sè.

   He performed excellently in the diving competition.

   Source: Dong Chinese Dictionary

2. 那个绝望的人在深夜跳水自杀。

   nà gè jué​wàng de rén zài shēn​yè tiào​shuǐ zì​shā.

   The desperate person committed suicide by jumping into the water late at night.

   Source: Dong Chinese Dictionary

3. 由于利空消息，该股股价在收盘前出现跳水。

   yóu​yú lì​kōng xiāo​xi, gāi gǔ gǔ​jià zài shōu​pán qián chū​xiàn tiào​shuǐ.

   Due to negative news, the stock's price plummeted before the market closed.

   Source: Dong Chinese Dictionary