in case of: In case of fire, open this safety door. 一旦发生火灾时,打开这扇安全门。 in the case of: In the case of a highly intelligent animal, elementary training is easy. 就高度灵敏的动物而言,初级训练并不难。 in case: In case she comes back, let me know immediately. 假使她回来了,立刻告诉我。 Take the raincoat in case it rains. 带着雨衣,以防下雨。