If you make Jell-o and you make it right, then once it's set or gelled, it has mechanical properties.

如果你用正确方法做出了吉露果冻,它一旦凉下来定了型,就有了机械性能

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So strings also support things like selection, slicing, and a set of other parameters, other properties. And let's just look at that.

如果我要到这里来的话，就得把这儿注释掉，这里是我已经建立的。

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And so the set of properties that describes system equilibrium doesn't change.

这些描述系统的属性,平衡是不变的。

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