round the clock例句
Rescue services have been working
round the clock to free stranded motorists.
救援部门一直在日夜不停地工作，解救被困司机。
Police mounted round-the-clock guards on properties last night.
警方昨晚通宵值守财物。
His parents kept a round-the-clock vigil at his bedside.
他父母日夜守护在他的床边。