It was quite a lucrative sideline

　　這份兼職很賺錢。

　　It's a lucrative business.

　　這是一筆賺錢的生意。

　　It was a great experience and lucrative as well.

　　它是一巨大經驗和賺錢的。

　　The target market is a lucrative one.

　　它的目標市場頗有利可圖。

　　Your own small business on the side sounds pretty lucrative.

　　你兼營的自己的小企業會很有利潤。