仅在三年前，中国还是煤炭净出口国。

Only three years ago China was a net coal exporter.

youdao

一般来说，不断上下移动的人口大约为脱离贫困的净人口的三倍。

Typically, about three times as many people move up or down as the net number of people who move out of poverty.

youdao

因此 CCS电厂至少需要比普通电厂大三分之一，才能产生同样多的净电量，并且还将至少多消耗三分之一的燃料。

So plants with CCS will need to be at least a third bigger than normal ones to generate the same net amount of power, and will also consume at least a third more fuel.

youdao

so you can see that there is going to be two sets in antibonding, three sets in bonding for a net of one, giving us the single bond.

因此你能看到,反键轨道上有两组，三组成键，得到一组净成键，所以成的是单键。

麻省理工公开课 - 固态化学导论课程节选