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  • 匿名
关注:1 2013-05-23 12:21

求翻译:Mammals evolved more than 200 million years ago, during the Triassic period, and monotremes were among the first (the very earliest mammals or mammal-like animals have since died out). Placental and marsupial mammals appeared during the Jurassic, sometime between 200 million and 160 million years ago.是什么意思?

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Mammals evolved more than 200 million years ago, during the Triassic period, and monotremes were among the first (the very earliest mammals or mammal-like animals have since died out). Placental and marsupial mammals appeared during the Jurassic, sometime between 200 million and 160 million years ago.
问题补充:

  • 匿名
2013-05-23 12:21:38
哺乳动物进化200多万年前,在三叠纪时期,单孔目动物是最早(最早的哺乳类动物或哺乳类动物一样,因为死了)。胎盘和有袋类哺乳动物,有时之间的200万和160万年前出现在侏罗纪。
  • 匿名
2013-05-23 12:23:18
哺乳动物演变得更为有200多万年以前,在同时期,monotremes是第一批(最早哺乳动物或哺乳动物一样自死动物都有)。 胎盘哺乳动物和添烦恼灾害频过程中出现的《侏罗纪公园》,期间的某个时候200多万和160多万年前。
  • 匿名
2013-05-23 12:24:58
Mammals evolved more than 200 million years ago, during the Triassic period, and monotremes were among the first (the very earliest mammals or mammal-like animals have since died out). 胎盘和有袋动物的哺乳动物出现在侏罗纪期间,某时在200百万和160百万之间年前。
  • 匿名
2013-05-23 12:26:38
哺乳动物进化超过 200 万年前,在三叠系期间,和 monotremes,当中包括第一个 (最早的哺乳动物或类似哺乳动物的动物有后来死亡出)。胎盘和袋哺乳动物出现在侏罗纪时期,200 万和 160 万年前之间的某个时候。
  • 匿名
2013-05-23 12:28:18
正在翻译,请等待...
 
 
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