cash cow
US /kæʃ kaʊ/
UK /kæʃ kaʊ/

名词
1.
摇钱树, 现金牛
a product or service that generates a large amount of money for a company, often with little effort or investment once established
示例:
•
Their flagship software has been a real cash cow for years.
他们的旗舰软件多年来一直是真正的摇钱树。
•
The old product line might not be innovative, but it's still a reliable cash cow.
旧产品线可能不具创新性,但它仍然是一个可靠的摇钱树。
在 Lingoland 学习这个单词