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There is a plurality of solutions that conform to the boundary conditions, which is that the system must be bound.
这有许多解决方式,来遵守这个有界条件，那个系统必须是有界的。
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An open system, as the name describes, allows mass and energy to freely flow through the boundary.
开系，顾名思义，允许质量和能量自由地,流过它的边界。
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There's no point where the circulatory system crosses the boundary between being inside you and outside of you, it's totally internal.
循环系统绝不会,跨越人体的内外界限,它完全位于体内
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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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It's insulated. It's a closed system. In fact, it's an isolated system. There's no energy or matter that can go through that boundary.
系统指的，是盒子里的东西,它是封闭孤立的。
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The closed system allows energy to transfer through the boundary but not mass.
闭系允许能量通过它的边界传递,但质量不行。
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You've got to place the boundary at exactly the right place, otherwise you've got a bit too much in your system or a bit too little.
你要把边界,设置在正确的位置上，否则你的系统就会要么多出一部分,要么少一部分。
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And then between the system and the surroundings is the boundary.
系统和环境之间的,是边界。
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