基本解释日晷同根派生 sundials相关词英汉例句Churchyards often have sundials in them.教堂大院里通常设置日晷。Inventors created sundials, which indicate time by the length or direction of the sun's shadow, to track temporal hours during the day.当时的发明家制造了日晷，利用太阳阴影的长度或角度，来测量白天真时的变化。sundials更多例句