This layer - with an oxygen density probably about 5 trillion times less than on Earth - was "too thin to be remotely detected", said Ben Teolis of the Southwest Research Institute in San Antonio.

圣安东尼奥市西南研究所的本·特奥里斯（Ben Teolis）说，这个大气层——其含氧量可能不亚于目前地球的5万亿倍——是“如此稀薄一致难以遥远地探测。”

youdao

The results show that the grain size of tin gradually gets smaller while that of alloy layer gets bigger and bigger with the increasing of current density.

结果表明，随着电流密度的增加，电沉积的锡晶粒度逐渐细化，合金层的晶粒度有变粗的趋势。

youdao

Furthermore the distribution and variation of the electrostatic potential and layer ionospheric current density at the northern hemisphere are calculated by the dynamo theory.

继而从发电机理论得到了电离层电位及层电流密度在北半球的分布和变化。

youdao

This melt water has a relatively low density, so it accumulates in the top layer of the ocean.

BBC: Melt may explain Antarctica's sea ice expansion

Waratek will let an enterprise swap out the middle layer of its software stack without changing its applications and significantly increase the density in data centers.

FORBES: Lousy London Economy Good For A Data Center Density Enhancer