4 sentences for 口子 (kǒu​zi — opening)

1. 他在手上剌了一道口子。

   tā zài shǒu shàng lá le yī dào kǒu​zi.

   He cut a gash in his hand.

   Source: Dong Chinese Dictionary

2. 他的衣服上撕了一个口子。

   tā de yī​fu shàng sī le yī gè kǒu​zi.

   There is a tear in his clothes.

   Source: Dong Chinese Dictionary

3. 他不小心在手上拉了一道口子。

   tā bù xiǎo​xīn zài shǒu shàng lá le yī dào kǒu​zi.

   He accidentally cut a gash in his hand.

   Source: Dong Chinese Dictionary

4. 这把菜刀不小心磕在石头上，崩了一个口子。

   zhè bǎ cài​dāo bù xiǎo​xīn kē zài shí​tou shàng, bēng le yī gè kǒu​zi.

   This kitchen knife was accidentally struck against a stone, and a chip was taken out of the blade.

   Source: Dong Chinese Dictionary