:first

1.第一happening or coming before all other similar things or people; 1st

2.最重要的；首要的；最优秀的the most important or best

大多数含有 first 的习语位于该习语中名词和形容词所在的词条，如 first acquaintance 位于 acquaintance 词条。Most idioms containingfirst are at the entries for the nouns and adjectives in the idioms, for exampleon first acquaintance is atacquaintance .

theres a first time for everything

没有发生的事情并不意味着永远不会发生；什么事情都有第一次the fact that sth has not happened before does not mean that it will never happen

1.首先；第一；最初before anyone or anything else; at the beginning

2.第一次；首次for the first time

3.（列举时用）第一，首先used to introduce the first of a list of points you want to make in a speech or piece of writing

4.（强调不愿意）宁可，宁愿used to emphasize that you are determined not to do sth

at first

起初；起先at or in the beginning

come first

首要；第一；首先要考虑的to be considered more important than anything else

first and foremost

首要的是；首先more than anything else

first and last

从各方面看；完全地in every way that is important; completely

first come, first served

先来先接待；先到先供应；按先来后到对待people will be dealt with, seen, etc. strictly in the order in which they arrive

first of all

第一；首先before doing anything else; at the beginning

first off

首先before anything else

first up

第一；首先to start with; before anything else

put sb/sth first

认为…最重要；把…放在第一位to consider sb/sth to be more important than anyone/anything else

1.[c]第一个人（或事物）the first person or thing mentioned; the first person or thing to do a particular thing

2.[c][ususing]空前的成就；前所未有的事情an achievement, event, etc., never done or experienced before

3.[u]（汽车、自行车等的）一挡，最低挡the lowest gear on a car, bicycle, etc. that you use when you are moving slowly

4.[c]~ (in sth)（英国大学学位）最高成绩，优等成绩the highest level of university degree at British universities

first among equals

第一把手；首要的事物the person or thing with the highest status in a group

from the (very) first

从一开始from the beginning

from first to last

从头至尾；自始至终from beginning to end; during the whole time

1.第一

1.最初的,最早的

2.最上等的,第一流的

3.基本的,概要的

4.高音(调)的

1.最初,第一;第一位

2.第一等,头等,优等,甲等;一级品

3.每月的第一日,一号

4.(棒球的)第一垒

5.【乐】高音部

6.【汽】起码[最慢]速度

1.第一,最初,首先

2.宁可

1.coming, happening, or starting before all the others; if you do something first, you do it before you do anything else; used for introducing the thing that comes before the others in a series or list; used for referring to a thing or place that you reach before any other when you are going somewhere

2.used for referring to something that has never happened before, or has not happened since a particular time; used for referring to someone who does something that no one has ever done before, or that no one has done since a particular time; something that has never happened before and is therefore important or exciting

3.at the beginning of a period of time, a situation, an activity, etc.

4.used for giving an important fact or reason that will be followed by other less important facts; used for referring to the main or most important thing

5.better than anyone or anything else in a game, competition, etc.

6.in the U.K. and Australia, the highest grade for an undergraduate degree from a university

7.used for referring to the lowest gear of a car, bicycle, etc.