She made a commitment to stay, but no one knows for how long.

她做出了留下的承诺，但没人知道会持续多久。

金山词霸

No matter how long they talk, the subject appears to remain unresolved.

无论他们讨论多久，这个话题似乎仍未得到解决。

金山词霸

It is difficult to predict how long it will run.

很难预测这会持续运行多久。

金山词霸

How long were you able to tolerate it?

你能够忍受多久？

金山词霸

How long has that house been up for sale?

那房子提出变卖已多久了?

《简明英汉词典》

How long should a murderer be kept in prison?

犯了谋杀罪的人应在监狱关多少年?

《简明英汉词典》

She asked the nurse how long her agony must last.

她问护士,她的极端痛苦要延续多久.

《简明英汉词典》

How long have you been working at the bank?

你在银行里工作多久了?

《简明英汉词典》

How long have you been working for this firm?

你为这家公司效力多久了?

《简明英汉词典》

How long should the engine warm up before we start?

我们出发前,引擎需要预热多久?

《简明英汉词典》

How long ago is it that you last saw her?

你上次看见她是多久以前?

《简明英汉词典》

How long can she dine out on her former success?

她靠往日的成功而享名的日子能有多久 呢 ?

《简明英汉词典》

How long must this go on? What's the sense of this?

这种局势要持续多久 呢 ?它有什么意义 呢 ?

《简明英汉词典》

How long do you intend to stay with the firm?

你准备在公司干多久?

《简明英汉词典》

How long have you been employed at this job?

你受雇做这个工作有多久了?

《现代汉英综合大词典》