“in constant motion”寫句子,用in constant motion造句
2018-06-07
Matterisinconstantmotionandconstantchange.Waitingaloneandunmoving,Itisatoncestillandyetinconstantmotion.Feeding,courtship,reproduction,andeven"rest"arecarriedoutwhileinconstantmotion.Electronsareinc...