第一流的英文：
first-class

Most of the Zace Building's space was still rented, but to less prestigious tenants with a high attrition rate.
萨可大楼大部分房间仍然有人租用，但房客却不是第一流的，而且损耗率也高。

An artist of the first magnitude
第一流的艺术家

He blossomed out as a first-rate athlete.
他已成为第一流的运动员。

First-class men are hard to come at.
第一流人物难得。

A first-class,good,poor,etc shot
第一流的、好的、差劲的...射手.

An aristocracy of talent [wealth]
第一流的人才[富豪]们

The sports facilities are superb.
运动设施是第一流的.

He ranks high as a scholar.
他是第一流的学者。

Cordon bleu cuisine
第一流名厨所治佳肴.

He blossomed out as a first-rate athlete
他锻炼成为第一流的运动员。

the First International
第一国际（1864－1876）

first approximation
第一次近似;第一近似值;初步近似;一次近似值;一级近似;首次近似

There was a hush at first.
先是一阵寂静。

It was semimonthly at first.
它一开始是半月发行一次的。

'The First Day' is their first collaborative album.
《第一天》是他们的首张合作专辑。

It is a step class.
这是踏板操训练班。

The class dismissed.
下课了。

The class teacher sectioned the class for dialogues.
老师把班级分组进行对话练习。

The class teacher dismissed the class on time.
教师按时下课。

A second - class letter is slower than a first - class.
二类信比一类信件慢。