Im doing my homework now.

我现在正在做作业。

youdao

I know what Im doing.

我知道该怎样做。

youdao

I have to exercise early in the morning before my brain figures out what Im doing.

每天一大早儿趁我的大脑还不知道我在做什么之前我必须锻炼。

youdao

First, I should say a few words about who I am and what on earth Im doing up here.

首先，我应该介绍一下我是谁和我究竟上来做什么。

youdao

First, I should say a few words about who I am and what on earth Im doing up here.

首先，我应该介绍一下我是谁和我究竟上来做什么。

youdao