What in the world is he doing?

他到底在干什么呢？

《柯林斯英汉双解大词典》

What is he doing calling at this time of night ?

他干吗这么晚了还打电话？

《牛津词典》

What the deuce is he doing?

他到底在干什么？

《牛津词典》

In other words, he would know what the children are doing even when he is not watching them.

VOA: special.2009.09.06

This is the first instance in which Richard will do what he later describes Mencken doing, using words as weapons.

如同门肯后来所做的,语言第一次被理查当作武器。

耶鲁公开课 - 1945年后的美国小说课程节选

there is almost a kind of metaphorical play between what he's describing and the sounds with which he is doing the describing.

这里有一个比喻,在他描述的东西和,他即将描述的声音。

耶鲁公开课 - 现代诗歌课程节选

He did so almost in public, to explain why he was doing what he was doing.

NPR: Senate Panel to Hear from Ex-DOJ Official

According to psychologist Cooper Lawrence, author of "The Cult of Celebrity, " though the media has painted him as the villain, fans will continue to rally around Chris Brown as long as he keeps doing what he is doing: publicly apologizing, remaining in the spotlight, touring and making music.

CNN: Chris Brown, Rihanna videos to premiere on same day

If investors remain cool, he can probably keep doing what he is doing now: slowly paying down debt and making earnings go up.

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