2 sentences

1. 天色阴沉，看样子要下雨了。

   tiān​sè yīn​chén, kàn​yàng​zi yào xià​yǔ le.

   The sky is overcast; it looks like it's going to rain.

   Source: Dong Chinese Dictionary

2. 王经理阴沉着脸走进办公室，一句话也没对大家说。

   Wáng jīng​lǐ yīn​chén zhe liǎn zǒu​jìn bàn​gōng​shì, yī jù huà yě méi duì dà​jiā shuō.

   Manager Wang walked into the office with a grim expression and didn't say a word to anyone.

   Source: Dong Chinese Dictionary