three
/θriː/cardinal number
1- equivalent to the sum of one and two; one more than two;3三; 三个：
her three children
她的三个孩子
a crew of three
三名机组成员
a three-bedroom house
带三个卧室的屋子
all three of them are buried there.
他们仨都埋在那儿。
(Roman numeral: iii or III. 罗马数字：iii 或III.)
1.1
- a group or unit of three people or things三个人（或物）一组：
students clustered in twos or threes.
学生们三三两两地聚在一起。
1.2
- three years old三岁：
she is only three.
她才三岁。
1.3
- three o'clock三点钟：
I'll come at three.
我3点来。
1.4
- a size of garment or other merchandise denoted by three（衣服等商品的）三号。
1.5
- a playing card or domino with three pips三点的纸牌（或多米诺骨牌）。
短语
three parts
- three out of four equal parts; three quarters四分之三（部分）。
词源
Old English thrīe (masculine)， thrīo, thrēo (feminine)， of Germanic origin; related to Dutch drie and German drei, from an Indo-European root shared by Latin tres and Greek treis.