1.
first-class carriages, compartments, seats, etc
头等的车厢、 车室、 座位等.
2.
It's a shirt that bangs the bush.
这是件头等的衬衣。
3.
That is number one western steer beef.
那是头等的四方小牛肉。
4.
Yes, it is a first class express train.
是的，是头等快车。
5.
care for the hair: the activity of washing or cutting or curling or arranging the hair.
护理头发的活动，包括洗头剪头等。
6.
It is an affair of the first magnitude.
这是头等重要的事情。
7.
A decision of capital importance.
一个头等重要的决定
8.
a matter of the utmost concern
关系重大的事，头等大事
9.
a crazy person, idea, suggestion
荒唐的人、 念头、 建议等
10.
grey eyes, hair, etc
灰色的眼睛、 头发等
11.
crackpot ideas, schemes, etc
异想天开的念头、 计划等.
12.
the head of a nail, hammer, axe, etc
钉子、 锤子、 斧子等的头
13.
photometer head with equality of contrast prism
等衬度棱镜的光度头
14.
a crack-brained idea, scheme, etc
愚蠢的念头、 计谋等.
15.
frozen [ freeze ] frame
(电影等的)静止镜头
16.
photometer head with equality of brightness
等亮度棱镜的光度头
17.
poise of the body, head, etc
身体、 头部等优美的姿势
18.
First class, window seat, please.
如果可能，请订头等，面向车头的座位。