2 sentences

1. 这把菜刀的刃口崩了一个小缺。

   zhè bǎ cài​dāo de rèn​kǒu bēng le yī​gè xiǎo quē.

   The edge of this kitchen knife has a small nick.

   Source: Dong Chinese Dictionary

2. 这把宝剑的刃口经过打磨，变得十分锐利。

   zhè bǎ bǎo​jiàn de rèn​kǒu jīng​guò dǎ​mó, biàn de shí​fēn ruì​lì.

   The edge of this sword has been polished and become very sharp.

   Source: Dong Chinese Dictionary