物体中机械能密度随时间变化时，伴随着机械能的传递，存在机械能流。

Following with mechanical energy transmission in medium, mechanical energy flow will be produced when the density of mechanical energy varies with time.

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物体中机械能密度随时间变化时，伴随着机械能的传递，将存在机械能流。

When mechanical energy density is variable with time in an object, the mechanical energy flow is bound to follow the transmission of mechanical energy.

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关键之处就在于速度，太阳能的传递几乎就在瞬间完成，所以很少能量以热的形式耗散掉。

Speed is the key –the transfer of the solar energy takes place almost instantaneously so little energy is wasted as heat.

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There's an interplay between the energy inside the gas which is the heat energy which is allowing me to do all that work to be outside, and so I'm using up some of the energy that's inside the gas to do the work on the outside.

即使没有热传递,能量也能以,做功的形式传递出去，气体的一部分内能,转化成了功。

麻省理工公开课 - 热力学与动力学课程节选

All of them could potentially be receiving signals from a ligand or a chemical.

它们全都能接收,由配体或某种化学物质传递的信号

耶鲁公开课 - 生物医学工程探索课程节选

Change often signals danger or opportunity and if we are especially tuned-in to change, it helps us survive ? and it helps us pass along our genes. Okay?

变化通常意味着危险和机遇,如果我们能调整适应变化，我们生存能力更强,并且能传递我们的基因，是不是？

耶鲁公开课 - 心理学导论课程节选