first class

第一流, 头等舱, 优先投递邮件

例句与用法：

This ticket doesn't entitle you to travel first class.

你这张票不能坐头等位。

He always travels first class expense is no object.

他出门总是用头等票－－费用不成问题。

The crew was made up of strong and able men and the mates were experienced seamen of the first class.

船上的全体船员都是强壮能干的人，大副二副们都是第一流的有经验的海员。

详细释义：

ph.

1. 上等; 最高级; 第一流

2. (车或船的)头等

3. 优先投递邮件

4. (英国大学的)考试成绩第一等