你是说羊皮纸基本上是循环利用的？

You are saying the parchment was basically recycled?

youdao

我是循环利用的狂热分子，而且尽可能地减少纸张使用。

I am a big fan of recycling and reducing our use of paper as much as possible.

youdao

答：整个殖民地的水都是来来回回循环利用的。

A: All the water in the colony is used over and over again.

youdao

Now what I want to do is put up a specific example of the cycle that can be undertaken inside here in an engine, and we can just calculate from what you've already seen of thermodynamics.

现在我想做的是,举一个例子,来具体说明热机内部的循环过程，同时我们可以利用热力学定律进行计算,看看热力学参量发生了什么变化。

麻省理工公开课 - 热力学与动力学课程节选

So even though it's true that some kind of recycling takes place, we can't conclude that everything that's now a part of me will continue to exist afterwards.

即使有一些部件会被循环利用,但我们不能断定,组成我们身体的每一部件都会死后永存

耶鲁公开课 - 死亡课程节选

In some cells they're recycled, that is the cell is able to take up the neurotransmitter after it's released and restore it, but most often there are enzyme systems inside the pre-synaptic membrane where those neurotransmitters are synthesized.

在一些细胞中神经递质可以循环利用,这些细胞可以吸收,已经释放出的神经递质并重新储存起来,但更常见的是突触前膜中含有酶系统,在此合成神经递质

耶鲁公开课 - 生物医学工程探索课程节选