2 sentences

1. 他的口角流露出一丝笑意。

   tā de kǒu​jiǎo liú​lù chū yī sī xiào​yì.

   A faint smile played at the corners of his mouth.

   Source: Dong Chinese Dictionary

2. 他们两个人在街上发生了口角。

   tā​men liǎng gè rén zài jiē​shang fā​shēng le kǒu​jué.

   The two of them had a verbal spat on the street.

   Source: Dong Chinese Dictionary