Number four, electron affinity.

数字4，电子亲和力。

youdao

Electron affinity, however, can be either negative or it can be positive.

但是，电子亲和能既可以是负的，也可以是正的。

youdao

Electron affinity, however, can be either negative or it can be positive.

但是，电子亲和能既可以是负的，也可以是正的。

youdao