The relation of scale conversion is gotten by use of the mass conservation equation.
同时，引入质量守恒方程，得出弹体的比例尺度换算关系。
This is the story of wildlife conservation in the age of mass extinction.
这是个关于在大规模的物种灭绝时代保护野生动物的故事。
We write it subject to conservation of mass.
要服从质量守恒定律。
Mass media can play an important role in wetland conservation education.
大众传播媒体在湿地保育教育方面占有重要地位。
Heating; Radiation; Be under construction; Mass; Energy conservation.
采暖；辐射；施工；质量；节能。
Heating; Radiation; Be under construction; Mass; Energy conservation.
采暖；辐射；施工；质量；节能。
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