Health and fitness have become big business.

保健已经成为大生意。

《牛津词典》

Trend 7: SMEs Become Big business.

趋势7：中小型企业成为重要业务对象。

youdao

Green building has become big business.

绿色建筑日趋兴盛，商机庞大。

youdao

He says smallholders can become big business.

VOA: standard.2010.03.29

So that's the way the world looks when the polis is invented and when colonization begins to become a big thing.

这就是城邦建立以及殖民开始兴起之时,古希腊世界的面貌

耶鲁公开课 - 古希腊历史简介课程节选

We'll see the statistics are really just fascinating about how big these armies become.

我们来看些统计数据,这些军队大得惊人

耶鲁公开课 - 欧洲文明课程节选

Mixed martial arts has become big business, with a large and growing fan base.

NPR: Mixed Martial Arts: Sport or Spectacle?

High-profile players like Hong Jin Ho are well aware that their game has become big business.

CNN: Superstar gamers hot property

This is simply the way of life in a game that has become big business.

BBC: Ferguson gets it right