keep watch and ward

昼夜倒班,work in shifts round the... ... ) work in shifts round the clock 昼夜倒班 ) keep watch and ward 昼夜当班 ...

Sharp Daily Weekly Reading ... a condemned ward = 死刑犯的监房； keep watch and ward = 日夜监视 ...

... casual ward (英国救济院的)临时收容所 keep watch and ward 守卫，监护 ward in chancery 受英国大法官保护的未成年者 ...