基本解释[土木建築工程]前置警告標志英汉例句雙語例句An advance sign; a warning.預兆預示或象征；advance warning sign更多例句词组短语短語railroad advance warning sign 道口預告標志advance ramp control warning sign 匝道控制前置預告標志advance warning sign更多词组专业释义土木建築工程前置警告標志