keep watch over的用法和樣例：
例句
- The dog kept a vigilant guard over the house.
這只狗警惕地守護著(zhù)這所房屋。 - While the Final Watch is busy fighting it, Anton gets to the sixth level.
最后的守護者忙于戰斗的時(shí)候，安東來(lái)到了第六層。 - Keep a close watch on the enemy rs movements.
密切注意敵人的動(dòng)向。 - Everyone must keep a sharp lookout for this sign.
大家要密切注意這個(gè)標記。
