My son has suffered terribly. He has lost his best friend.

我儿子遭受了可怕的打击，失去了最好的朋友。

《柯林斯英汉双解大词典》

The one thing he didn't have was a son. I think he's felt that a grandson is the next best thing.

有一样东西他没有，就是儿子。我觉得他有个外孙感觉也不错。

《柯林斯英汉双解大词典》

He is the best father in the world, even as I am the worst son that can be found.

他是世界上最好的父亲，就像我是世界上最坏的儿子一样。

youdao

The late president's son had the best-financed campaign, the support of the security services and the political infrastructure of the ruling Gabonese Democratic Party.

VOA: standard.2009.08.30

The late president's son and former defense minister has both the best-financed campaign, the backing of security services, and the electoral infrastructure of the ruling Gabonese Democratic Party.

VOA: standard.2009.08.28

Maj Bowman's family said he had been the "best possible son and brother" who "loved the Army and was very proud of the selfless work that he and his company were doing".

BBC: UK soldiers killed by rogue Afghan named by MoD

But they were his best, his son Paul Becker, also a violin maker, says.

WSJ: Master of Chicago Family's Violin-Making Tradition

We were discussing which so-and-so teacher would best suit my son's so-and-so needs.

CNN: Parents, why are you pushing your kids?