It was difficult for the inspectors to discover which documents were important and which were not.

检查员们难以发现哪些文件重要，哪些不重要。

《柯林斯英汉双解大词典》

Find out which of these are native plants and which are exotic.

找出哪些是本地植物，哪些是外来的。

youdao

We have to stoop to see which are fruits and which are flowers.

我们要弯下腰来看清哪些是水果，哪些是花朵。

youdao

"During that time she can make regular income and she has a savings account and she begins to study and plan for launching a business, which is her business and which will sustain her once she graduates from BeadforLife.

VOA: special.2010.06.28

For me, those were opportunities that came unexpectedly and which I was able to take advantage of.

对我来说，这些机会是意外的收获,我也从中受益匪浅。

普林斯顿公开课 - 人性课程节选

and which of course I understand, like in Massachusetts, six months of the year,

我很理解这一点，像在马萨诸塞，一年有六个月

加州的天气 - SpeakingMax英语口语达人

Is it diet, healthcare, social structure, even climate - and which is the most important?

BBC: Why do the Italians live longer than us?

Genetics largely determine which women will still be fertile at 40 and which ones won't.

WSJ: More Doctors Broach Subject of Women's Age and Fertility

Strategy boils down to selecting which options to pursue and which options not to pursue.

FORBES: BMW's Focus on Sustainability Drives Record Q1 Profits