When is it coming out in paperback ?

这本书的平装本什么时候出版？

《牛津词典》

When is it time to seek help?

什么时候是寻求帮助的时机？

youdao

Daming: When is it?

大明：那是什么时候？

youdao

The scientist says this mission has been planned for many years, but he is not sure when it will happen.

VOA: special.2010.05.25

Sweden kind of disappears from the great power state when they're defeated by Peter the Great in--when is it?--1709.

在1709年被彼得大帝打败后,［此处指的是1709年的波尔塔瓦之战］

耶鲁公开课 - 欧洲文明课程节选

Well, one way of course is to accept the objection and say " "You're right Death isn't really bad for me " And some philosophers have indeed accepted that very conclusion, maybe Epicurus Most of us want to say " "No, no Death is bad for me" So we need a better answer to the ?" "Oh yeah? When is it bad for you?"

一种方式当然是接受它并说,“你是对的，死亡对我来说真的没什么坏处“,而一些哲学家确实接受了,那个结论，也许比如伊壁鸠鲁,我们大多数人想说,“不，不，死亡对我来说有坏处“,于是我们需要一个更好的答案来回答,“是么？，它什么时候对你有坏处了“

耶鲁公开课 - 死亡课程节选

When is it OK to pitch a story idea via a Twitter direct message?

FORBES: Oh, That Test!

For example: When is it OK to share something rad I just found online?

CNN: Bad at sharing? Try these 3 social networks

But when is it worth the splurge for first-class tickets in Europe and places far beyond?

CNN: 8 reasons to trade up on trains