It is difficult to make oneself concentrate for long periods.
让自己长时间聚精会神是很困难的。
Sitting in one position for long periods of time is nor healthy.
长时间保持一种姿势并不健康。
It'll have to operate for long periods of time in very cold temperatures.
它必须长时间在非常低的温度下运行。
And contracts often run for long periods.
而合同是长期的。
Avoid standing for long periods of time.
避免长时间站立。
Some of them can loiter in the air for long periods.
一些无人机可以长时间的在空中盘旋。
Must be able to run reliably for long periods of time.
必须能够可靠地运行很长一段时间。
I've never been able to do it for long periods of time.
我是从来都躺不了那么长的一段时间。
Sitting badly for long periods of time can deform your spine.
长时间的错误坐姿会使你的脊柱变形。
One has to be available while doing nothing for long periods.
当一个人无所事事很长时间后干什么都是可以的。
It could change its color and go for long periods without food.
在没有食物的情况下，它可以改变体色并存活很长的时间。
It simply is natural for infants not to sleep for long periods.
它只是自然的婴儿不能长时间睡觉。
They go mental if they are left alone for long periods of ti me.
他们的精神，如果他们单独留很长时间。
Writers need to work with concentration for long periods of time.
写作者需要长时间的专注工作。
Wear comfortable shoes and avoid standing for long periods of time.
穿着舒适的矮跟鞋和并避免长时间的站立是孕妇特别要注意的。
Will keep for several months if not left out in air for long periods.
如果不把它凉在空气中可以玩好几个月。
Some species can survive for long periods in very low oxygen tensions.
有些种类能在很低的氧气张力下长期生活。
Long, slow running will only teach you to run slowly for long periods.
长、慢跑只会教你的身体跑慢和跑久。
We remain immobile for long periods of time in plane, train or car seats.
在我们待在飞机，火车或汽车座位上的时间段里，很长时候是固定不动的。
Idling for long periods of time (greater than one minute) may waste fuel.
长时间的怠速(超过一分钟)费油。
Untiring ability to work and cover rough terrain for long periods of time.
具有不知疲倦的、在崎岖的地形下长时间工作的能力。
I can maintain the language, even if I go for long periods without using it.
我可以保持对这门语言的掌握，即使我长时间不用它。
Suitable for most chairs, particularly when you're sitting for long periods.
最适合的椅子，特别是当你长时间坐着。
Time: Dogs are social creatures and should not be left alone for long periods.
时间：狗是群居的动物，不可让它们独处太久。
The camel is characterized by the ability to go for long periods without water.
骆驼的特点是能够长时间走路而又不喝水。
Some stick together for long periods, but for others the association is transient.
有些粘在一起很长时间，但对其它来说伙伴关系则是暂时的。
And very importantly, we are willing to be misunderstood for long periods of time.
更重要的是，我们敢于被别人长期误解。
And, very importantly, we are willing to be misunderstood for long periods of time.
而且，很重要的的，我们都愿意长时间误解。
And, very importantly, we are willing to be misunderstood for long periods of time.
而且，很重要的的，我们都愿意长时间误解。
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