这款新游戏迅速成为公司的摇钱树，第一个月就赚了数百万美元。

The new game quickly became the company's ___moneymaker, earning millions in its first month.

那位说唱歌手总是夸他的赚钱工具（moneymaker）是他最赚钱的利器。

The rapper always brags about his ___moneymaker being his biggest money-making tool.