1 sentence

1. 由于环境污染，湖里的鱼类种群数量大幅减少。

   yóu​yú huán​jìng wū​rǎn, hú lǐ de yú​lèi zhǒng​qún shù​liàng dà​fú jiǎn​shǎo.

   Due to environmental pollution, the fish population in the lake has decreased significantly.

   Source: Dong Chinese Dictionary