It becomes this economic dynamo because of that, and thus traders are to be found everywhere.

由于运河的开凿,使得这里成为欧洲经济的发动机,各国的商贩在这随处可见

耶鲁公开课 - 欧洲文明课程节选

You have 500 miles of canals dug just in the middle decades of the seventeenth century.

仅在十七世纪中叶,这里就开凿了,五百英里的人工运河

耶鲁公开课 - 欧洲文明课程节选

But what you have are these canals.

当时他们开凿了这些运河

耶鲁公开课 - 欧洲文明课程节选