Quadrinomial
a. 四项式的\\nn. 四项式
🗣️ 情景例句
He's writing to invite me
他写信邀请我
Next week I must start my term paper for Poli Sci.
到下周，我必须着手写政治学的期末论文了。
Before he retired, Frank was the head of a very large business company, but as a boy he used to work in a small shop.
在退休前，弗兰克是一家非常大的商业公司的经理，但他小时候却在一家小铺里做工。