extinct but already fully marine cetaceans are known from the fossil-record什么意思

extinct but already fully marine cetaceans are known from the fossil-record什么意思 but she has already gone I came ,but you've already extinct什么意思? extinct是什么意思啊`` extinct 什么意思 extinct什么意思 But she has already cone cone 只有那个翻译么、 用...has/have already been...but...not...yet.造句用...has/have already been...but...not...yet.造句，要三句， Holly has______fed the dog,but she hasn't watered the plants_______A.still alreadyB.already yetC.yet stillD.yet already ,Holly has _fed the dog ,but she hasn's watered the plants_.A.still ;already B.already,yet C.yet,still D.yet,already麻烦 extinct；extinction是什么意思啊?如何背? 是prevent the animals from being extinct 还是protect the animals from being extinct? I can't forget you but you have already forgotten me 我是英文白痴 Mum ,have you bought any prawns_________?--------yes,l haveA yet B already C and D but dog ,but ,already ,I,It,cat,have ,a,cute ,a,is连词成句 “Suddenly want to find you to speak word very much ,but find have not already.简答 This old man is already o_____50 yuan old,but he still looks young