extinct什么意思?

extinct什么意思? extinct 什么意思 extinct什么意思 extinct but already fully marine cetaceans are known from the fossil-record什么意思 extinct是什么意思啊`` 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? thought .the team rediscovered 3 species thought extinct. 这句英语有错误否 changer啥意思?67.Scientists do not know why dinosaurs became extinct,but some theories postulate that changers in geography,climate,and sea levels were responsible.67.科学家不知道恐龙为何绝种了,但是一些理 The difference between“A tiger is in danger of becoming extinct.”and“The tiger is in danger of becoming extinct.”Thanks. Tigers are in danger of becoming extinct.虎有灭绝的危险, 这段英文是什么语法?What could be more useless than studying these extinct giants? a species becomes extinct when the last existing member of that species dies.4532 pretty什么意思,什么意思,什么意思 keen什么意思意思 ,which would otherwise run the risk of becoming extinct..These national parks are very important for preserving many animals,who would _otherwise______ run the risk of becoming extinct后半句翻译一下 什么意思 什么意思