millionaire

After the tech company went public, many early employees became overnight millionaires.

(Chinese) 在那家科技公司上市后，许多早期员工一夜之间成了百万富翁。

The local millionaire donated a significant portion of his wealth to build the new city library.

(Chinese) 当地那位百万富翁捐出了很大一部分财产来建造新的城市图书馆。