insure againststh
—phrasal verbwithinsureverbuk/ɪnˈʃɔːr/us/ɪnˈʃʊr/
to do something inordertopreventsomethingunpleasantfromhappeningor fromaffectingyou
对…采取预防措施
Wethoughtwe'dinsureagainstrainby putting atentup wherepeoplecould takeshelter.我们想为了以防万一得支起一个防雨帐篷，这样大家就可躲雨了。