Union set
[计] 并集
🧩 词语组成解析
set
[sɛt]
vt. 放置，安置;使处于某种状况;设置;摆放餐具;
vi. 落山;出发;凝结;
n. 一套，一副;集合;布景;电视机;
adj. 固定的;位于…的;顽固的;安排好的;
🗣️ 情景例句
We haven't heard from him for weeks but we're still hoping for a letter.
我们已经有几个星期没有他的消息，但仍然盼望着他的来信。
We waved until the car was out of sight.
我们挥手直到汽车消失。
It's against the rules to handle the ball in soccer.
在足球中以手触球就是犯规。