It may have been manufactured hours or days ago in your lungs.

它可能是几个小时前或几天前在你的肺里制造的。

youdao

However, the promise is often broken quite quickly and people are back into their bad habits within weeks or days.

然而，承诺往往很快就会被打破，人们在几周或几天内就会恢复他们原来的坏习惯。

youdao

Iterations often take hours or days rather than weeks.

迭代过程通常只花费几个小时或者几天，而不是几周。

youdao

"And that short,few-hour exposure is able to trigger a heart attack where they might not have had it for days or months,or never."

VOA: standard.2010.08.04

We would not expect that the mean should be over 160, or in one case, 150, after only 100 days trading, right?

我们本来觉得平均值应该大于160。,或者在一个例子中是150，这是100天之后的？

麻省理工公开课 - 计算机科学及编程导论课程节选

It's for 3 or 4 days and it's put on by a local businessman who's a blue grass freak,

它会持续3到4天，是当地的一名商人赞助的，他是个热爱蓝草的怪人，

愉快的音乐庆典 - SpeakingMax英语口语达人

Specifying hours or days for workers to work is another indicator of an employer.

FORBES: Employees or Independent Contractors?

Generally it happens right after they set the rate, within a couple of weeks or days.

NPR: A Homeowner's Know-how on the Latest in Mortgage Loans

"The smaller ones may not be seen until a week, or days before impact, " Chodas said.

CNN: Scientists reduce odds of Earth-asteroid collision