threes
n. 三岁；（扑克牌中）对三；（篮球）三分球
n. 数字3；带有数字3或长度、重量等为3的事物；三岁的人；三分球（three 的复数）
例句
People arrived in twos and threes.
人们三三两两地到了。
《牛津词典》
Bad things come in threes.
坏事成三。
"All good things go in threes," said she, "I am asked to stand godmother again."
“好事成三呀，”她说，“又有人请我当教母了。”
