2 sentences

1. 你一定在做晚饭时划伤了自己。

   nǐ yī​dìng zài zuò wǎn fàn shí huá shāng le zì​jǐ.

   You must have cut yourself making dinner.

   Source: OpenSubtitles

2. 以前清洗后留下的污垢也会划伤表面。

   yǐ​qián qīng​xǐ hòu liú xià de wū​gòu yě huì huá shāng biǎo​miàn.

   Dirt left over from previous cleanings can scratch the surface as well.

   Source: CCMatrix