batten down the hatches (暴风雨或失火时)钉上扣板密闭舱口；封舱；未雨绸缪，做好准备；钉上舱口压条封闭舱口

【例句】
My sister's children were coming to stay so we had to batten down the hatches.
我姐姐的孩子来住几天，我们得事先作好准备。

You and your friends better batten down the hatches, because when it hits.
你和你的朋友们最好小心点因为到那个时候