The new product became a goldmine for the company. 该项新产品成了该公司的聚宝盆。
With this new invention, we're sitting on a goldmine. 有了这项新发明,我们就是坐在金山上了。
Anton: Wow! He'll be sitting on a goldmine when it's finished. 安东:啊,建成之后,令尊就像开了个金矿。
goldmine
[ noun ]
a good source of something that is desired
<noun.artifact>
a mine where gold ore is found
<noun.artifact>
His great poem is a wonder-book of passion as well as a goldmine of artifice.
Gross domestic product fell from Dollars 3.5bn (Pounds 2.3bn) in 1989, to Dollars 3.2bn the following year, but growth then picked up as the Porgera goldmine and Kutubu oil field projects came on stream.