Requisiteness
n. requisite的变形
🗣️ 情景例句
The best way to promote your products is through advertising.
推广产品最好的方法就是买广告。
Courtesy costs nothing.
谦虚恭敬，不用分文。
His parents did not know what was wrong.
他的父母亲不知道他有什么毛病。