他因持械抢劫而关押了十年。 He was put away for ten years for armed robbery.
窃贼被关押在监狱里。 The thief was confined in a prison.
关押，按今时今日的情形来说，是比它的受害者[指囚犯]所犯的罪行更为恶劣的罪行。 Imprisonment, as it exists today, is a worse crime than any of those committed by its victims.
监禁，下狱被关押或囚禁的状态 A state of imprisonment or captivity.
在一出极为成功的演出中，一位著名演员有一次被选派扮演一名贵族。这位贵族被关押在巴士底狱已20年了。 A famous actor in a highly successful play was once cast in the role of an aristocrat who had been imprisoned in the Bastille for twenty years.