因为本内特先生需要请假一段时间，所以他要求开一张病假条。
Since Mr. Bennett was going to need some time off work, he asked for a sick note.
在不需要时给予建议是了结一段友谊的最快方式。
Giving advice when it's not called for is the quickest way to end a good friendship.
您必须考虑需要在您的环境中工作一段时间的临时用户的体验。
You have to consider what the experience is like for casual users who need to work in your environment for a while.
如果我们想在其中任何一种环境中生存一段时间，我们都需要机械辅助。
If we wish to survive in either for any length of time, we need to have mechanical aids.
要判断性格的复杂方面，比如神经质还是思想开放，需要一段时间。
It takes a while to judge complex aspects of personality, like neuroticism or open-mindedness.
曾经有一段时间，亨利需要一本语法书来学习。
过了一段时间，他听说比格尔号轮船要去南美旅行，需要一位中间派。
Some time later he heard that the ship Beagle was going on a trip to South America and needed a centrist.
在大多数州，在颁发许可证之前需要一段等待期。
In most states a waiting period is required before the license is issued.
含油或醋的沙拉可以储存很长一段时间，而且不需要冷藏。
Oil or vinegar based salad can be stored for a long period of time without refrigeration.
许多种子需要一段时间分层的原因是为了保证种子在恶劣的天气来临之后而不是之前生长。
The reason why many seeds require a period of stratification is to guarantee that the seeds grow after and not before unfavorable weather.
要想让森林成为有价值的“碳汇”并一直持续到未来很长一段时间，就需要降低它们现在吸收碳的能力。
Helping forests flourish as valuable "carbon sinks" long into the future may require reducing their capacity to absorb carbon now.
价格会随着收成、自然灾害和政治不稳定而波动；当价格上涨时，需要一段时间才能找到新的供应来源。
Prices fluctuate, in response to harvests, natural disasters and political instability; and when they rise, it takes some time before new sources of supply become available.
大多数人只在沙滩上玩一天或者使用晒黑床一段时间不会被晒成古铜色的皮肤，因为黑色素的合成是需要时间的。
Most people don't tan after just one day at the beach, or one session in the tanning bed, because it takes time to make melanin.
在此类研究中，研究人员需要在很长一段时间内对上音乐课和未上音乐课的不同小组的儿童进行追踪——即使任务并不是完全随机的。
In such studies, researchers would need to follow groups of children with and without music lessons over a long period of time—even if the assignments are not completely random.
这一点可能更难实现，但要达到效果需要很长一段时间。
This one may be a bit more difficult to pull off, but it can go a long way to achieving results.
当然，每隔一段时间你都需要一些时间喘口气，但最重要的是不断运动、扩展和学习。
Of course, you'll need some time to catch your breath every so often, but the essential message is keep moving, extending and learning.
练习一段音乐4个小时需要集中注意力，但它远不及一个在外过夜的14岁女孩对认知的要求。
Practicing a piece of music for four hours requires focused attention, but it is nowhere near as cognitively demanding as a sleepover with 14-year-old girls.
许多种子在发芽前需要一段时间来分层，并在低温下储存一段时间。
Many seeds require a period of stratification, exposure to low temperatures for some minimum period, before they will germinate.
你可能需要走一段距离。
他们取得了进展，但要研制出疫苗还需要相当长的一段时间。
They are making progress, but it will be quite a while before any vaccines are ready.
在我被如此需要了这么长一段时间之后，很难退一步，并且觉得自己是多余的。
When I've been needed so much for such a long time, it's hard to step back and feel unnecessary.
这将通常是因为我们需要流等待异步事件发生(需要等待一段固定的时间)。
This would typically be where we need the flow to wait for an asynchronous event to occur (which takes a fixed period of time).
她需要一段时间来思考，就在这王室墓地漫步着。
Needing a moment to think, she wandered around the royal sepulcher.
他还说“当洪水退去之后，动物们还要被收留很长一段时间，因为回到他们原来的栖息地需要一段时间。”
"Animals will be displaced for so long that, when the water does recede, it will take a while to get back to their original habitats," he said.
但安德森说，在这些改进影响市场价格前还需要一段时间。
But Anderson says it will take time before those improvements impact market prices.
但安德森说，在这些改进影响市场价格前还需要一段时间。
But Anderson says it will take time before those improvements impact market prices.
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