It's not for me to say why he left.

不适宜由我说出他离开的原因。

《牛津词典》

It's not for me to pass judgement on your behaviour.

我无权评判你的行为作风。

《牛津词典》

M: Not for me, for the children.

玛：不是给我自己，是给孩子们。

youdao

And it is not for me to set myself up as the one person able to answer it.

VOA: special.2009.04.18

When you lead the meditation, I think kneeling is fine, but for me it's really painful, not everybody can do that.

当进行冥想时，我觉得跪地可以接受，但确实感到疼痛，不是人人都可以坚持。

普林斯顿公开课 - 人性课程节选

If you want to control a program file, open, copy, paste not get me ready for my trip to Stanford.

如果想要掌控一项程序文件，打开，复制粘贴，并不会铺平通向斯坦福的路。

斯坦福公开课 - 微软CEO-Steve.Ballmer谈科技的未来课程节选

And then, when I had my first boyfriend, I realized maybe it's not for me.

CNN: For Better Or For Worse

"It's not for me to say why this is the first, " she told BBC News.

BBC: Evelyn Grace Academy wins Stirling Prize

I'm sure there's some creative use in it for some other people but not for me.

BBC: Johnny Marr on The Smiths and going solo