3 sentences

1. 这段犯罪记录成了他一生中无法抹去的污点。

   zhè duàn fàn​zuì jì​lù chéng le tā yī​shēng zhōng wú​fǎ mǒ​qù de wū​diǎn.

   This criminal record became an indelible blemish on his life.

   Source: Dong Chinese Dictionary

2. 纯的伏特加不会给军服和荣誉留下任何污点。

   chún de fú​tè​jiā bù huì gěi jūn​fú hé róng​yù liú​xià rèn​hé wū​diǎn.

   A straight vodka leaves no stains on uniforms and honor.

   Source: OpenSubtitles

3. 他的白衬衫上有一个洗不掉的污点。

   tā de bái chèn​shān shàng yǒu yī gè xǐ bù diào de wū​diǎn.

   There is a permanent stain on his white shirt.

   Source: Dong Chinese Dictionary