That's the amount of smoke through s per unit time.
这就是单位时间通过s的烟雾的总量。
So, this flux measures how much smoke is passing through s per unit time.
这个流量度量了,单位时间内通过s的烟雾的多少。
This is the amount of smoke that we are losing per unit time.
这就是单位时间烟雾减少的总量。
This is the amount of smoke that we are losing per unit time.
这就是单位时间烟雾减少的总量。
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