The restoration took almost 4,000 man-hours over four years.

这项修复工作大概用了4000工时，历时4年。

《柯林斯英汉双解大词典》

youdao

I have seen this happen. Just last week my minor crimes of indolence cost two companies about eighty man-hours.

我见过这样的事，就在上周，我的懒惰导致两家公司多花费了八十工时。

youdao

"The amount of preparation that goes in,you know, companies spend millions more in production costs,man hours, .

VOA: standard.2010.01.27

This monumental novel about 20 hours in the life of an average man can be read and appreciated like any other great novel once its framework and form are visualized, just as we can enjoy Hamlet without solving all the problems which agitate the critics and scholars."

这部不朽的小说是关于一个,平常人生命中的二十个小时,在它的框架和形式显现出来的时候,它就能像其他伟大小说一样被阅读和欣赏，就像我们欣赏《哈姆雷特》那样,不用解决那些激发批评家和学者讨论的问题“

耶鲁公开课 - 1945年后的美国小说课程节选

Eagle was flying. Man had been on the moon for twenty-one and one-half hours.

VOA: special.2009.07.15

How many man hours are spent validating the source and validity of data in reports?

FORBES: Do Executives Care About Data Quality?

Silicon-based life forms now make short work of tasks that once took us many man hours to accomplish.

FORBES: Cyber Security And The Rise Of The Silicon-Based Life Form

Additionally, budgets will be redirected from the in-house man hours required to oversee the more routine parts of the job.

FORBES: Autonomics Will Change The Future Of Office Work (Ask Siri)