4[si]，数字，是3与5之间的自然数，也是正整数、偶数、有理数、实数。4是正整数中最小的合数，是数字2的2倍。它也是一个平方数。4虽是阿拉伯数字，但是最终来自古印度所创造，后又让阿拉伯人传播，传至欧洲通用于全世界。

4用英文怎么写？

Four

英 [fɔː(r)]  美 [fɔːr]

n.四;四个;第四四的;四个一组之物

复数： fours

four的双语例句

1.These last four years have been hard on them. 

过去的这四年里他们吃了不少苦。

2.We saw the therapist four times, and the children have now settled down. 

我们去看了四次治疗专家，现在孩子们已经稳定下来了。

3.We ordered four beefsteaks. 

我们点了四块牛排。

4.I bid four diamonds. 

我叫四个方块。

5.There are at present four television channels. 

现在有四个电视频道。

four的词汇搭配

four hundred 四百 

four corners 十字路口

drive a coach and four through 找出漏洞 

on all fours 匍匍

Four-H Club 四健会 

four-square 方形的

four-wheeler 四轮出租马车

four-letter word 低俗字眼

four-wheel drive 四轮驱动 

four-poster bed 有四根帷柱的床

gang of four 四人帮 

four championships on the run 四连冠 

four consecutive championships 四连冠 

four straight championships 四连冠

Four Freedoms 四大自由 

the Four Seas 英国周围的四海

within the four corners of 不越出范围 

the four hundred 四百家族

four的真题例句

1.The competition only happens every four years and the last time the team went, they won the third place in the nation.

2019年6月四级真题（套）听力 Section C

2.The insect-spraying over the weekend left more than 2 million bees dead on the spot in Dorchester County, South Carolina, where four travel-related cases of zika disease have been confirmed in the area.

2018年6月四级真题（第二套）听力 Section A

3.It's about four male scientists and a female waitress.

2019年12月六级真题（套）听力 Section A

4.Once every three or four years, when conditions are right, the lake is covered with the pink birds as they stop flight to breed.

2017年12月六级真题（第三套）阅读 Section C

5.After having taught fifth-grade classes for four years, I decided to try all costs to rid them of their fear and dislike of books, and to get them to read oftener and more adventurously.

2015年高考英语浙江卷 阅读理解 阅读A 原文

6.At my high school, there were about only four active club and organizations that students could be a part of.

2016年高考英语浙江卷（6月） 阅读理解 七选五 原文

7.Runners range from four year old to grandparents; their times range from Andrew Baddeley's world record 13 minutes 48 seconds up to an hour.

2017年考研真题（英语二）阅读理解 Section Ⅱ

8.Some Congress members are trying to block the plan, and at least a dozen industry groups, four states, and three environmental groups are challenging it in federal court.

2016年考研真题（英语二）阅读理解 Section Ⅱ