Emptiness problem
[计] 空集问题
🧩 词语组成解析
emptiness
['emptinis]
n. 空虚;空腹;无知;无能;
🗣️ 情景例句
He was a dull man and you had to explain things very slowly to him.
他脑筋迟钝，你必须慢慢地给他解释事情。
Know something like the palm of one's hand.
熟知其事，了如指掌。
Tell your wife about me and how much I loved you.
把我的情况告诉你的妻子，对她说我多么爱你。