His best friend died under questionable circumstances.

他最好的朋友在不明的情况下死了。

《柯林斯英汉双解大词典》

For a child, a dog is his best friend when he has no friends to play with.

对于一个孩子来说，当他没有朋友可以一起玩的时候，狗是他最好的朋友。

youdao

His best friend Lucas Santos spoke about his abilities on a video for The Sun.

他最好的朋友卢卡斯·桑托斯在为《太阳报》拍摄的一段视频中谈到了他的能力。

youdao

His best friend Patrick is a loyal but stupid starfish.

VOA: special.2009.08.21

This -- "Damon's Epitaph" ends with a virtual orgasm of Christian consolation as Milton gives his best friend the most unbelievable sendoff that is possible to give.

这--在《达蒙的墓志铭》的结尾,弥尔顿给了他最好的朋友他所能给的最不可思议的送别礼,是真实的肉体的欢愉，同时却又是基督教的慰藉。

耶鲁公开课 - 弥尔顿课程节选

His best friend is coming. He called me 10 minutes ago.

他最好的朋友会来。他10分钟前给我打了个电话。

I'm sure 实战 - SpeakingMax英语口语达人

Reidy considers Kelman his best friend but wants that to be a nonissue at work.

FORBES: Magazine Article

Lord Lucan probably committed suicide in the Channel after leaving Britain, according to his best friend.

BBC: Lucan 'committed suicide'

Asher Seator, his best friend, wept as he called on officers to launch a full inquiry.

BBC: Anger over singer Smiley Culture police raid death