Pentavalent
a. 五價的\\n[醫] 五價的
??? 情景例句
Am I older than you? You look so young.
我比你老嗎？你看起來非常年輕？
Her name has slipped from my mind.
我想不起她的名字了。
I was so tired. I could have slept for a week.
我累死了！我能蒙頭睡上一星期。