单语范例（未经PONS编辑处理）
Later, he invented the safety razor, an invention which would allow him to develop into a wealthy businessman despite never completing his formal education.
en.wikipedia.org Safety razors are a great way to get a cheaper, less irritating shave.
www.lifehacker.com.au It also proposed the first safety razor.
en.wikipedia.org It involves the use of a safety razor, a shaving brush, shaving soap, and a handful of other supplies.
www.desiblitz.com These new safety razors did not require any serious tutelage to use.
en.wikipedia.org