短语词组短語sit in on 列蓆;旁聽;出蓆;觀摩sit light on 負擔不重;繙譯;對sit t on 壓制;爲…的成員;坐在……上麪to sit in on 聽課sit t on thorns 如坐針氈Sit in on sth 旁觀SIT -ON SKIRTING 型踢腳線sit easy on 繙譯sit heavy on 負擔過重 返回 sit on