How long a stay did you have in mind?

你原打算待多长时间？

《牛津词典》

We can arrange time efficiently and know how long a single task will take.

我们可以有效地安排时间，并知道每项任务需要多长时间。

youdao

youdao

They will have to tell how long and how much it would take to pay off a card if the holder makes only the lowest monthly payment.

VOA: special.2009.05.22

So these are symbols telling us how long a particular frequency is to endure.

因此,这些符号是告诉我们,某个特定的声音频率要持续多长时间

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it doesn't matter how rich you are. So, just being able to live a long healthy life.

再富有都没用。所以健康长寿最重要。

成为教练的理由 - SpeakingMax英语口语达人

People with ADD are terrible at estimating in advance how long a task will take.

NPR: Excerpt: 'Delivered from Distraction'

They look, though, a little like warnings as to how long a cup of Starbucks stays good.

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Now, nobody knows how long a mobile manager might stay with a company, or where he will retire.

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