應該,最好
had better / best (do sth)
(告訴別人應該做的事)應該,最好
used to tell sb what you think they should do
You'd better go to the doctor about your cough.你最好去找醫生看看你的咳嗽。
釋義來自《牛津高階英漢雙解詞典》第 9 版