No one knows how long it will last.
谁也不知道会持续多久。
No matter how heavy the rain is, and no matter how long it will last, it will stop one day, and the sun will come.
不管雨下多大，也不管它会持续多久，总有一天雨会停下来，太阳也会出来。
The relationship between the amount of light an incandescent bulb can produce and how long it will last is complicated, to say the least.
退一步说，一盏白炽灯能产生的亮度与其照明寿命之间的关系很复杂。
It's never happened before, so nobody really knows how bad it will be, how long it will last, or even how well eventually get out of it.
还没有发作过，也没人晓得会有多可怕，会持续多久，怎样走出也不晓得。
Even if managers know that a new product will follow this cycle, they cannot be sure when each phase will start and for how long it will last.
即使管理者们知道一个新产品要经历这个周期，他们也无法确定各个阶段将会于何时开始，以及将要持续多长时间。
Once you know approximately how long it will last, you can prepare how you will pace yourself and which are the most important points you want to make.
一旦你知道面试时间，你就可以为如何把握面试节奏做准备，想想哪些是你在面试中一定想要表达的点。
We'll only find out in the race on Sunday how long it will last because the track conditions are constantly changing prior to that as more rubber gets put down.
只有到周日比赛中我们才能搞明白他到底能撑多久，因为随着橡胶更多的洒落，赛道情况时刻在变化。
“Just from last month’s sales, it’s making more money than when I was employed as an engineer at Volkswagen, though I’m not sure how long it will last, ” Kim said.
Kim说：“光上月的销售，我赚得就比在大众做工程师的时候还多，但是我不知道这样还能维持多久。”
No what special, just give up on the previous who is not pleasing to the eye, I know people can not live in the memories, after all, who do not know how long it will last.
没什么特别，只是放弃以前的对谁都不顺眼，我知道人不能活在回忆里，毕竟谁都不知道它会存在多久。
It isn't clear how long this will last, or how the banking model might evolve in response to the current market crisis.
这种情况会持续多久，或是银行业务模式会有何变化以适应当前的市场危机，人们尚不得而知。
Merck's vaccine was studied in clinical trials for five years, and Glaxo's for nearly six and a half, so it is not clear how long the protection will last.
默克公司的疫苗临床试验研究了五年，葛兰素公司研究了将近六年半，因此还不是很清楚疫苗的保护时间能维持多久。
Analysts also warn that until the full extent of the damage caused to Japan's economy and businesses becomes clear, it will be difficult to predict how long the impact on other countries will last.
分析家也警告说到日本此次灾害对日本本国经贸的影响程度明朗以前，都很难预测出对灾害其它国家的影响会持续多久。
The coverage of the governor's troubles lifted newsroom morale but it is anybody's guess how long that will last.
与州长的麻烦相关的报道提升了新闻编辑室的士气，当然这些报道可以维持多久也恰恰是大家都在猜测的。
That doesn't mean that banner ads haven't been lucrative for some publishers who place them on their sites -- but it does call into question how long that sort of advertising will last.
它并不是说广告条对刊登它的广告发布商无利可图，但它不禁让我们怀疑这种广告还能维持多久。
会持续多久呢？
For the time being, CoTweet will remain a free product, though it is not clear how long this public beta will last and what CoTweet will charge afterwards.
目前，CoTweet还是一款免费的产品，但是不清楚这次公开beta测试会持续多久，以及随后CoT we et会收取多少费用。
But as it spreads through the workplace, covering all aspects of your job and life, I wonder how long the fun will last.
但随着它在职场传播开来，涵盖你工作和生活的方方面面，我怀疑这种乐趣能够持续多久。
How long will the ceremony last? I do not hope it lasts 4 hours.
典礼需要多长时间？我真希望不会持续4个小时。
It is unclear just how long the search will last.
搜救要持续多久还是个未知数。
SPF isn't like a sunscreen power level, but rather what determines how long the sunscreen will last before you need to reapply it.
SPF并不说明防晒功效的等级，而是决定涂一次的防晒效果能维持多久。
Will love ever last and how long it could last?
爱情会永远存在么或者最长能存活多久呢？
It is not clear how long the police visit will last.
目前还不清楚这些警官将停留多长时间。
How long will an unchained bicycle last on a city street before someone steals it?
在城市的大街上，一辆没锁的自行车多久会有人偷？
It is difficult to estimate how long this will last.
很难估计这种情况将持续多久。
This new job-how long will it last?
这份新工作——要干多长时间？
America's economy is in a funk. How bad will it get and how long will it last?
美国经济令人忧心忡忡：它会糟到何等地步？持续多久？
America's economy is in a funk. How bad will it get and how long will it last?
美国经济令人忧心忡忡：它会糟到何等地步？持续多久？
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