"One reason why not," says Silbergeld, "is that some people are allergic to certain scents pumped into products or stores."

西尔贝格德说：“为什么不这样做的一个原因是，有些人对注入产品或商店的某些气味过敏。”

youdao

Why not create more time to go hiking, fly kites or do some other outdoor activities?

为什么不创造更多的时间去远足、放风筝或做一些其他的户外活动呢？

youdao

He prowled around the room, not sure what he was looking for or even why he was there.

他在房间里悄悄地走来走去，不知道自己在找什么，甚至不知道自己为什么在那里。

《柯林斯英汉双解大词典》

The men were not fully told why they were being studied or what tests were being done to them.

VOA: special.2010.07.21

Why, then, should we not study the acquisition of a cognitive structure like language more or less as we study some complex bodily organ?

我们为什么不应当,像研究某些复杂身体器官那样,去或多或少地研究,像语言这样的认知结构的习得

耶鲁公开课 - 心理学导论课程节选

Well, why not state chartered banks or why not credit unions or other things?

政府为什么不出租银行,为什么不出租信用社或者其他金融机构？

耶鲁公开课 - 金融市场课程节选

Explain why or why not.

NPR: Bringing Life to Physics Class

Why not wait for them, or why not include them more in the talks?

WHITEHOUSE: Press Briefing

But researchers did not directly ask participants why they did or did not get married, Kadan-Lottick said.

CNN: Study: Childhood cancer survivors less likely to marry