Quadrivalence
n. 四价\\n[医] 四价
🗣️ 情景例句
but there's so much energy and talent in the man,
但是他有那么多的精力和才能，
Punctuality is the soul of business.
严守时间是办事情的重要原则。
Well, would you like something to drink? What about a glass of milk?
你想喝些什么吗？要不要一杯牛奶？