A How long have you worked here?
A你在这里工作了多长时间？
A How long is your wife staying?
A你妻子来这里待多久？
A How long will it take me to get there?
a到那里需要多长时间？
A How long have you lived in Beijing?
A你在北京住多久了？
A How long does it take to fly to Shanghai?
A乘飞机到上海需要多长时间？
How long a stay did you have in mind?
你原打算待多长时间？
"Hello, haven't seen you for a long time! You look fine! How is the young man?"
“你好，好长时间没见到你了！你看起来很好！那个年轻人怎么样？”
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。
Macfarlane had wondered for a long time how the Industrial Revolution came about.
麦克法兰早就想知道工业革命是如何发生的。
The difficulty of a problem was defined in terms of how long it took to complete.
问题的难易度是以解决这个问题所花时间的长短而定的。
Everyone understood how hard it was to get back into the swing of things after such a long absence.
每个人都明白离开这么长一段时间后要重新全力投入有多难。
Of course, a number of factors will dictate how long an apple tree can survive.
当然，一棵苹果树能存活多久是由许多因素决定的。
How long he'll be able to do so is a moot point.
他还能这样做多久是一个未知数。
You sneak a look at your watch to see how long you've got to wait.
你偷偷看一眼手表，看还要等多久。
Millie smiled back! She didn't know how to start jumping with a long rope.
米莉笑着回应！她不知道如何开始用一根长绳子跳。
How long have you been a taxi driver?
你当出租车司机多长时间了？
Good afternoon. How much? How long? How nice! How beautiful! A: Good morning. B: morning.
下午好！多少钱?多久?（多长?） 多漂亮啊！ 多美啊！
How long have you been a librarian?
你当图书管理员多久了？
Could you tell me what I have to do to obtain a student visa and how long the process will take?
你能告诉我获得学生签证需要做些什么，需要多长时间吗？
How long have you been a market research consultant?
你做市场调查顾问多久了？
Steve, can you tell me how long you've been a pub owner?
史蒂夫，你能告诉我你当酒吧老板多久了吗？
We really don't know a lot about how long a wood frog normally lives, probably just a few years but there is no evidence its longevity.
对于一只树蛙通常能活多久，我们确实知道得不多，可能只有几年，但没有证据表明它能长寿。
So how long can a gene survive in a species if it is no longer used?
那么，如果一个基因不再被使用，它能在一个物种中存活多久呢？
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