目前世界上二分之一的人口生活在农村。

The people of the world in half still live in rural areas.

youdao

粮食是世界上二分之一的人口赖以生存的食物。

The diet of half of the world's population is based on rice.

youdao

但是，当今世界上二分之一以上的人口并未享受到任何类型的社会安全保护。

But today more than half the world's population is excluded from any type of social security protection.

youdao

So, shared electrons are the ones that are shared between the carbon and the nitrogen, so we have 6 shared electrons, and we want to take 1/2 of that.

共用电子是那些在碳和氮之间,被它们共用的电子，那么我们有六个共用电子，然后我们要给它乘上二分之一。

麻省理工公开课 - 化学原理课程节选