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The number of moles stays the same a closed systems, gas doesn't come out.
摩尔数保持不变,因为是闭系，气体不会跑出去。
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- 来自原声例句
The number of moles stays the same a closed systems, gas doesn't come out.
摩尔数保持不变,因为是闭系，气体不会跑出去。
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