Old-boy
老生；（招呼用）老朋友
🧩 词语组成解析
old
[old]
adj. 老的;古老的;以前的;（用于指称被替代的东西）原来的;
n. 古时;
boy
[bɔɪ]
n. 男孩，少年;儿子;小伙子，家伙;服务员;
🗣️ 情景例句
It's still raining. I want to play tennis.
仍然在下雨。我想打网球。
I really don't know.
我真的不知道。
the bank and its customer owe a large number of obligations to one another.
银行和储户彼此还需承担大量义务。