sails的知识聚焦

Two little boats without any sails

Two little boats without any sails

1、Whatmakesopeningpianosohard?为什么钢琴盖很能打开?2、Twolittleboatswithoutanysails,Withtenpassengersondonotgoontheriverorsea,Buttravelondrythedaytheboatspasstoandfro,Butatnighttheyarebothempty.有两只...