good-by的用法和樣例：
例句
用作名詞 (n.)
- He bade his farewell by waving his hat.
他揮動帽子表示告別。 - We went to the bank together then said good bye and separated.
我們一起去銀行，然後彼此告別就分手了。 - The art of being a good guest is to know when to leave.
當好客人的藝術就是知道什麼時候該告辭。 - C. I noticed the guests leaving his home one by one.
我看到客人們正一個接一個向他告辭。
辭彙搭配
- by the good offices of 由 ... 的斡旋...
- error by good faith 善意過失
- by good fortune 幸好
- by good luck 僥倖地
