All best friends are friends, but not all friends can be best friends.

所有最好的朋友都是朋友，但并不是所有的朋友都能成为最好的朋友。

youdao

The only thing neighbors have in common, to begin with, is proximity and unless something more develops that isn't reason enough to be best friends.

首先，邻居间唯一的共同点就是距离近，除非有进一步的发展，否则不足以成为最好的朋友。

youdao

We used to be best friends?

我们以前是最要好的朋友啊！

youdao

Rather they presuppose relations that is to say political relations not between lovers or even best friends of some kind but between civic partners who may in fact be intensely rivalrous and competitive with one another for positions of political office and honor.

相反地，他们假设的关系,确切地说是政治关系,并非介于爱人或甚至是最好朋友间的关系,而是介于公民伙伴间,他们可能处于,彼此紧张敌对或竞争的关系,以求争得政治官位或荣誉。

耶鲁公开课 - 政治哲学导论课程节选

You know how some teen girls have mothers who just want to be best friends?

FORBES: Being Boss And The Minefield Of Office Friendships

But can sisters simultaneously be best friends and chief adversaries?

WSJ: Lucinda Rosenfeld, Author of The Pretty One, on Sisters | Word Craft

Fun and frugality can be best friends.

FORBES: Connect