System: an assemblage or combination of things (parts) forming a complex or unitary whole

系统：事物（部件）的集合或组合，形成复杂或单一的整体

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Ecology majors study the web of living and nonliving things in an environment to understand how the whole system works.

生态学专业通过研究环境中生物和非生物网来理解整个生态系统是如何运行的。

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This is providing work that's being used in here, but if you take the whole outside of the surroundings and this whole thing is the system, no net work, these things cancel each other, and yet heat's going up.

如果把外面的全部当成环境，把这里的全部当成系统,那么就没有净的功，它们相互抵消了，热量向上传输，会发生什么？

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Now, that's true for a whole bunch of things in our tax system.

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So there are a whole bunch of things we can do to make the health care system more efficient.

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The whole company is 7 years of history, and there are so many things in the system that needs to be built up.

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