system is the opposite of the open system, no mass and no energy can flow through the boundary.

孤立系与开系正相反，没有质量或能量,能流过它的边界。

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And you can get to things like the macro-stressed insure, and energy flow in a much more robust way than you can even in an advanced course of magnetism.

所以你便可以更形象地理解,像微粒，能量流动,等概念,你甚至可以,比在高级课程更讲的程度深。

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