Quadrivalency
n. 四价
🗣️ 情景例句
I'm unemployed right now, but I'm looking for a job.
我现在失业了， 但我正在找工作。
Let sleeping dogs lie.
不要惹事生非。
Look at those monkeys. What're they eating?
瞧那些猴子。它们在吃什么？