求翻译：mammals multiplied when the animals that were…harmful to them disappeared .急!

The spread of mammals happened after the disappearance of the dinosaurs.求翻译 求翻译：mammals multiplied when the animals that were…harmful to them disappeared .急! Are dolphins fish or mammals 翻译 求帮忙翻译下面这段英文If the total numbers of species for the major animal groups are compared, mammals, with about 4,000 species, are last. The list on the left shows the most numerous (insects) to the least numerous (mammals) , by number 翻译:Dolphins are mammals,not fish,but they swim together in a school mounting empirical evidence suggests that many animal experiments are performed callously without any heed to the discomfort or pain that laboratory mammals endure.怎么翻译? ____cats and ___tigers belong to ___same family of mammals.A.The；/；the； B.The；the；/ ； C./ ；/ ；the；D./ ；/ ；a；求详细解题过程 求普及下语法 一篇the largest mammals in the world的短文,求它的问题:what is the title of the table等等深圳版本…… 翻译英语句子,急啊!1.we are going to talk about mammals.2.we are talking about mammals.3.they look like eggs.4.they look forthe eggs.5.in spring,in is cold in the morning.6.they can fly,but they don't lay eggs.7.how about you,Kate?8.i want an The Largest Mammals in the World 把该句子的倒装变正常语序应该是什么?Missing until recently were fossils clearly intermediate,or transitional,between land mammals and cetaceans.如何翻译呢。这个intermediate 和 transitional 指的是 fossil么？ in the first place,drug experimentation on live mammals is,undeniably,far more effective than experimentation on bacteria or on other lower species in determining drug safety.怎么翻译? Human being are natural enemies of marine mammals. 什么意思? Mammals give birth to their young. 什么意思 does anyone know when mammals first appeared on earth 越南语翻译（求翻译) 求翻译翻译 五线谱翻译...求翻译.