短語詞組短語Be on guard against 防範(fàn);小心防備;警戒;警惕stand on guard against 防止on guard against risks 風(fēng)險防範(fàn)be on guard against everyone 人都有戒心be strictly on guard against 小心警惕地防範(fàn);嚴(yán)防to be on guard against 提防 返回 on guard against