短语词组短语sit in on 列席;旁听;出席;观摩sit light on 负担不重;翻译;对sit t on 压制;为…的成员;坐在……上面to sit in on 听课sit t on thorns 如坐针毡Sit in on sth 旁观SIT -ON SKIRTING 型踢脚线sit easy on 翻译sit heavy on 负担过重 返回 sit on