first-name basis

or refer to him or her on a first-name basis.

或者是称呼他或她首名（而不是叫XX先生或女士）

We are a first name basis.

我们是直呼对方名字的好友.

But too few Americans are on a first-name basis with edible plants, studies show.

研究表明，但很少有美国人食用水果与蔬菜，可以直呼其名。

JANET WILSON : First-name basis. Excellent.

詹妮特威尔逊: 名字. 很好.

Not many people are on a first-name basis with him.

不是很多人和他亲密得直呼名字。

He likes that he can sit and check his phone in peace or chat up the barkeeper with whom he's on a first-name basis if he wants to have a little interaction ．

他喜欢安静地坐着查看自己的电话，或者如果想和人交谈的话，他会和一个他只记得名不记得姓的酒保聊两句。