音标：[fɒ:]
num. 四, 四个
【机】 四冲程循环
英汉词典
four的短语、例句：
four
pron, det
1 4; one more than three 4, 四（个）. =>App 4 见附录4.
2 (idm 习语) on all `fours (of a person) with one´s hands and knees (and usu also toes) on the ground （指人）双手和双膝（通常还用脚趾）著地, 趴著
The baby was crawling about on all fours. 婴儿那时正在满处爬. =>illus at kneel 见kneel插图. (be) on all fours (with sb/sth) (be) the same in importance, function, etc (as sb/sth else) （重要性, 作用等）（与某人[某事物]）相同, 一致. four, n
1 the number 4 *4; 四.
2 group of four people or things 四个人或物的一组.
3 (crew of a) rowing-boat for four people 四人划行的船（员）.
4 (in cricket) shot, scoring four runs, in which the ball crosses the boundary after having hit the ground （板球）得四分的一击.
four