This posed a conundrum for researchers working with the laser: How were they to apply the laws of conservation of charge and conservation of energy with two forms of energy output?

这就为研究激光的工作人员出了一个难题：如果能量输出有两种形式，他们怎样运用电荷守恒和能量守恒定律呢？

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This paper introduces the concept of extended total space, and then we extend conservation of charge and conservation of current to general case.

在文中引入了扩展全空间概念，由此得到电荷守恒和电流守恒的一般形式。

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This paper introduces the concept of extended total space, and then we extend conservation of charge and conservation of current to general case.

在文中引入了扩展全空间概念，由此得到电荷守恒和电流守恒的一般形式。

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