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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To take charge of works on provincial conservation of water and soil; to guide and coordinate the administration and infrastructure construction of countryside water utilities.

负责本省水土保持工作；指导、协调农村水务基本建设和管理。

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To take charge of works on prefectural conservation of water and soil; to guide and coordinate the administration and infrastructure construction of countryside water utilities.

负责本州水土保持工作；指导、协调农村水务基本建设和管理。

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