他弟弟是他唯一的亲人。

Tā dìdi shì tā wéiyī de qīnrén.

His younger brother is his only family.

你是我唯一相信的人。

Nǐ shì wǒ wéiyī xiāngxìn de rén.

You’re the only person I trust.

这部电影里我唯一不喜欢的就是那些背景音乐。

Zhè bù diànyǐng lǐ wǒ wéiyī bù xǐhuān de jiùshì nàxiē bèijǐng yīnyuè.

The only thing I didn’t like about this movie was the background music.