"Why am I doing this?" she asked.

我为什么要做这个？

youdao

Why Am I Doing This Task?

为什么我要完成这项任务？

youdao

Why am I doing this now?

我为什么要这样做？

youdao

So, again, this is why I'm disclaiming that this isn't all that interesting yet, but what am I doing.

此外，这就是为什么我放弃那个，这个不是那么,有趣，不过我现在在做什么呢？

哈佛公开课 - 计算机科学课程节选

This is very important,which is why I am doing it: "If we want to know how fast a human being can run, then it is no use to average out the speed of a "good sample" of the population; it is far better to collect Olympic gold medal winners and see how well they can do.

这话非常重要，是我作这个研究的原因：,“如果想知道人类最快能跑多快，那从好的样本中测出平均数是“,没用的;,而应该收集田径类奥运冠军的信息,看他们能跑多快。

哈佛公开课 - 幸福课课程节选

Why am I doing this?

FORBES: Cream Puffs, Gum And Fried Chicken: Confessions Of A Self-Saboteur

And my second question, I am really puzzled why you two gentlemen are exactly doing this briefing today.

CENTERFORSECURITYPOLICY: DOD Briefing on Intelligence Matters

From the day we met, he was Mr. Sets My Brain on Fire, then he evolved for a long, lovely spell into Mr. Makes Me Sing REO Speedwagon in the Shower, but there was always an undercurrent of Mr. You Are Seriously Pushing Your Luck Here, and I eventually found myself doing the ol' step-ball-change with Mr. Why Am I Banging My Head Against This Wall?

NPR: Kristin Chenoweth Is 'A Little Bit Wicked'