时常被些朋友呢称为东冬，我自己的解释是东北的冬天。

I usually is called Dongdong by some friends, It means "The Northeast Winter for me".

youdao

这也称为字典攻击，因此您的密码最好不应该是密码或Star trek字符名，甚至您的呢称。

This is known as a dictionary attack, and it's one of the many good reasons why your password shouldn't be password or the name of a Star Trek character or even your dog's name.

youdao

摄影、美术、书法以及表演艺术作品注册发布，您只需要在下面给自己取一个好记又有意义的呢称，就可以进行作品发布。

Photography, fine art, calligraphy and art works of registration issued, you need only below to choose a good and meaningful known, it can be published works.

youdao

And why did he call it polar covalency?

为什么要称它为极性共价呢？

麻省理工公开课 - 固态化学导论课程节选

And why did I call it a sigma?

为什么我要称他为sigma呢？

麻省理工公开课 - 固态化学导论课程节选