含有数字four的英语成语 ■four square 直率的；坦白的 The girl is four square. 这女孩很直率。 http://yingyu.chazidian.com ■on all fours 爬着 The baby was crawling about on all fours. 婴儿那时正在满处爬。 ■four-lettered words 下流话 These books are full of four-lettered words. 这些书里脏话连篇。 ■in fours 每组四个 Group together in fours! 每四人一组! Students are standing in a line，in fours. 学生们每组四人排成队。