det 两个，二(one more than one)：～parts/pieces/courses/eyes/miles 两部分/两片/两种课程/两只眼睛/两英里;

pron 两个，二(one more than one of sth)：～of us 我们当中的两个人;a day/moment/pound or～一两天/一会儿/一两磅;by/in～s and threes 一次两三个地;cut the cake in～把蛋糕切成两半;one or～friends 一两个朋友;That makes～of us.(infml)我有着同样看法 (我和你处于同样地位)。

put two and two together 推测：You won't be able to keep your marriage a secret — people will soon put～and～together. 你结婚的事，保不住秘密。人们很快就会知道的。

n 数字2(cardinal number that is next after the number 1)：a～room flat 两间一套的房子;Room two 2号房间;

→′two-bit adj 不重要的;͵two-di′mensional adj 两维的;͵two-′edged adj 双刃的;双重的;͵two-′faced adj 两面派的;′twofold adj & adv 二倍(的);双重(的);͵two-′handed adj 双手使用的;双人使用的;′twopence n 两便士;最小数额;′twopenny adj 值两便士的;便宜的;不值钱的;͵two-a-′penny adj 易得到的，便宜的;͵two-′piece n 两件一套的衣服;′two-ply adj(指毛线、木板等)双股的;双层的;͵two-′seater n 双座汽车(飞机);′twosome n 一双(对);两人玩的游戏;′two-time v 欺骗;′two-tone adj 有两种颜色或声音的;͵two-′way adj 双向的;

【注意】in two 意思是成为两片或两块，可以说cut/divide/break sth in two (切/分/破成两半)。而in two's 意思是“分成两个两个一组”，如：For this game the players have to arrange themselves in two's.(这个游戏要求参加者分成两人一组进行。)

【用法】 in two和into two 有不同的用法。如：cut the string in two (把绳子剪成两段);break the biscuit in two (把饼干掰成两半);这里in two 只有“切断(开)”的含义，而into two 强调的是组成的、合成的部分的数，如：They put up a partition，to divide the room into two. (他们搭起一块隔板，把房间分成两半。)