Null set
[计] 空集, 零集
🧩 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
He has enormous funds at his command.
他掌握着巨额资金。
Don't touch it!
不许碰！
I'll also need a list of all your and her relations' addresses and telephone numbers.
我还需一张你与她的全部亲属的地址清单与电话号码。