twain英 [tweɪn]美 [tweɪn]num. 二BNC.22146 / COCA.33929习惯用语num.never the twain shall meet二者永远合不到一起;泾渭分明;大相径庭used to say that two things are so different that they cannot exist together牛津词典number二two英英释义nountwo items of the same kindSynonym:couplepairtwosomebracespanyokecoupletdistichduoduetdyadduad双语例句