I don't know what it was that did the trick, but I am definitely feeling much better.

我不知道是什么起的作用，但是我确实觉得好多了。

《牛津词典》

At first she could not tell what it was.

起初，玛丽还不知道那是什么。

youdao

She felt as if she must find out what it was.

她觉得自己必须弄清楚那是什么。

youdao

The Greater New Orleans Community Data Center says the city's population is about seventy-seven percent of what it was before Katrina.

VOA: special.2010.01.22

Exactly, so I just help them breath, to picture themselves and feel that, and actually feel what it was like.

正是如此，我帮他们调整呼吸，想象并感受自己，真切地感受。

普林斯顿公开课 - 人性课程节选

I chose English Literature because when I started off a university, I didn't know what it was I wanted to do.

我选英语文学是因为当我刚上大学的时候，我不知道自己到底想做什么。

为何选那门专业？ - SpeakingMax英语口语达人

What is more, it would keep logs of precisely what it was your child was doing.

FORBES: First There Was Apple's MapGate, Now Welcome ParentGate

In other words, demand for Explorers is half of what it was just two years ago.

FORBES

The outflow of the river is about 10% of what it was in the 1940s.

FORBES: Magazine Article