Actually, what is implicit in this explanation is that I am counting positively all the stuff that flows across C in the direction of n and negatively what flows in the opposite direction.

以上的解释实际默认了,把沿着n方向流过C的,都算作正值,相反方向的，算作负值。

youdao

Relatively, the acetone extract includes more components of lower boiling point, while it is opposite for n-hexane extract.

相对来说，丙酮提取物中的低沸点组分偏多，正己烷提取物中的高沸点组分偏多。

youdao

In short, Apple and Google might have been seen as heading in opposite directions over maps, but Google is at the (lowercase n) nexus of a whole lot of things that are making the iPhone better than it has ever been.

FORBES: Could Maps and iPhone be Google's Real Nexus?