long since片语KK [lɔŋ sɪns] /lɔŋ sɪns/发音片语1早已、早就多与完成式连用The factory has long since closed, and the workers have moved away.那家工厂早已关闭,工人也都搬走了。2很久以前、久已Those carefree summers are long since gone.那些无忧无虑的夏天已是很久以前的事了。用这个字练口说→