conservation of charge 电量守恒 ; [物] 电荷守恒
law of conservation of charge [物] 电荷守恒定律
law of electric charge conservation 电荷守恒定律
conservation law of charge 电荷守恒定律
Law of Charge conservation 电荷守恒定律
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？
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。
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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