1.
Something having four parts, units, or members, such as a musical quartet or a four - cylinder engine.
四个一组之物四个（人或物）一组，如音乐四重奏，四缸发动机等
2.
The soldiers counted off from the left by four.
士兵们从左起四个一组大声报数。
3.
consisting of or especially arranged in sets of four.
由四个组成的或以四个为一组的。
4.
Those four and Bob formed a basketball team.
那四个人加上鲍勃组成一个篮球队。
5.
The set of simultaneous equations breaks up into one set of four, one set of two and one set of one simultaneous equations.
此联立方程组分解为一组四个，一组两个和一组一个的三组联立方程。
6.
one of the four countries that make up the United Kingdom of Great Britain and Northern Ireland.
组成联合王国的四个国家之一。
7.
A complete quartic polynomial consists of 15 terms.
一个完整四次的多项式由15项组成。
8.
a set of four similar things considered as a unit.
作为一个单位的有四个相似事物的一组。
9.
A set of four persons or things.
四人一组或四物一套
10.
A square has four90- degree angles made by its four perpendicular.
一个正方形由四个九十度的直角和四条垂线组成。
11.
Something having14 parts, units, or members.
十四一组的物品有十四个部分、单位或成员的某物
12.
Any of four folds of tissue of the female external genitalia.
阴唇女性外生殖器的四个皱褶组织之一
13.
"In the point Block where I live today, only four units share a level."
如今住在一层只有四个单位的点式组屋。
14.
B: Medley swimming is a combination of four different swimming styles into one race.
混合泳是指一个比赛项目由四种泳姿组成。
15.
Relay: A race in which athletes race in teams of four, taking turns to run.
接力赛：四人组成一个队，轮流跑完全程的径赛。
16.
Group testing model on four counterfeit coins
一装置搜索四个坏硬币的分组测试过程
17.
A group or combination of four associated by common properties or behavior.
四个构成的一组因共同的财产或行为而联系在一起的四人小组或联盟
18.
The system consists of four parts.
系统由四个部分组成