He's been here for years, he should know the ins and outs of the job by now.
他在这里已经好多年,现在理应熟悉各方面的工作了。
Least said,soonest mended.
少说为妙。
Twenty or thirty pages of information handed to any of the major world powers around the year 1925 would have been sufficient to change the course of world history.