“侦察兵”的主要任务去携带一套固定的视频摄像机用于实时传输，还有各种不同的红-外系统。

The Scout's main missions were to carry a stabilized video camera for real time transmission, and various infra-red systems.

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加州已经遭受旱灾多年，某些地区甚至不得不从数百英里外抽取淡水，输送到他们的给水系统中。

California has been facing a drought for many years now, with certain areas even having to pump freshwater hundreds of miles to their distribution system.

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这些河流和河川系统被称作“外源河流”，因为它们的源头位于干旱地区之外。

These rivers and river systems are known as "exogenous" because their sources lie outside the arid zone.

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Somebody say it real loud. Yes, the system is working on the surroundings, right? It's pushing out against them.

有人很大声的回答了，对，系统在对外做功，他把外界向外推开。

麻省理工公开课 - 热力学与动力学课程节选

Let's imagine maybe instead we just immediately dropped the pressure let the system expand against the lower pressure.

现在假设,我们很快地降低压力,让系统在低的外压力下膨胀。

麻省理工公开课 - 热力学与动力学课程节选

No one, until this time, had suggested that a system would be subjected to quantization except for light.

在他之前，还没有人提出过,除光系统外的量子化系统。

麻省理工公开课 - 固态化学导论课程节选