短语词组短語off -guard 毫無準備的;失去警惕的off my guard 失去了我的防備be off my guard 未戒備著Catch Off -Guard 隨手武器Caught Off -Guard 突然捕獲off f guard 猝不及防Find One Off His Guard 乘其不備throw someone off his guard 使某人失去警惕ward off and guard against 防止 返回 off guard