There is an extremely close relationships between time, space, mass source and mineralization.

在时间上、空间上及物质来源上与成矿有着极为密切的关系。

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Evaporation quantum of liquid is expressed as mass source for vapor in vapor mass conservation equation, while it is dealt with mass sink for itself.

在建立多孔介质各相质量守恒方程时，液体蒸发量相对于蒸汽相而言为质量源，对液相本身而言为质量汇。

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The source of exposure is currently under investigation. Her family raises chickens but did not report any mass poultry illness or death.

接触源调查目前正在进行之中，她家养了鸡，但没有任何大规模家禽生病或死亡报告。

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It's this - its cells in this region here, this inner cell mass that that's the source of embryonic stem cells, cells from inner cell mass here.

就是这个,在这片区域的胚胎细胞,即内细胞群,而胚胎干细胞的来源所在,就是源自这里的内细胞群

耶鲁公开课 - 生物医学工程探索课程节选

Manufacturing is just never again going to be a major source of mass employment.

FORBES: Now Apple's Manufacturing Is Leaving China

Manufacturing as a source of mass employment is just never coming back: get used to the idea.

FORBES: What Is It With This Nostalgia For Manufacturing Jobs?

The sad point being that whatever the boom in US manufacturing it is still true that the days of sector as a source of mass employment are over, dead and gone.

FORBES: The Revival Of American Manufacturing: But The Jobs Still Aren't Coming Back