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