Is not a large source of income.

并非一个大的收入来源。

youdao

Examples include large medical bills, the loss of financial aid or an unexpected change in the financial condition of their source of support.

VOA: special.2009.01.29

And so in the 1940s, a group of people led by Collier started to develop a large scale production method for making a reliable source of vaccinia virus.

在二十世纪四十年代,科利尔带领一群人开始研究,一种大规模的生产方法,这种方法能制得牛痘病毒的可靠来源

耶鲁公开课 - 生物医学工程探索课程节选

The government sector has also traditionally been a large source of revenue for F5.

FORBES: F5 Networks Stock Heading Back Up To $120

Also, the Fed was planning to stop buying medium- and long-term Treasurys in October, removing a large source of demand.

FORBES: On The Cover/Top Stories

Early film crew members were often off-duty sailors or longshoremen, a large source of group labor in the U.S. at the turn of the 20th century.

FORBES: Hollywood Hard Hats