low specific activity material 低比度放射性物质
activity in material production [劳经] 物质生产活动
cathode activity material 阴极活性物质
activity mixing material 活性混合材料
Sometimes they roused for material activity but that was growing rarer.
偶尔被唤醒进行某些实际活动,但这已经越来越少见了。
The so-called culture is refers to including the tool, the utensil, the morals, the law and so on human material activity and the spiritual activity sum total.
所谓文化是指包括工具、器物、道德、法律等在内的人类物质活动和精神活动的总和。
The latter two sources are limited to those few areas where surface water seeps down through underground faults or fractures to reach deep rocks heated by the recent activity of molten rock material.
后两种来源局限于少数区域,在这些区域,地表水通过地下断层或断裂往下渗透,从而接触到被近期的熔岩活动加热的深层岩石。
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