我们观察描述鳄蜥的胚前发育：精巢和卵巢的形态特征；

We observed and described the feature of testis and ovary;

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刺背鳄蜥的进化速率比起包括洞熊、狮子、公牛和马在内的动物，都要快得多。

The tuatara rate is significantly faster than for animals including the cave bear, lion, ox and horse.

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我们本以为刺背鳄蜥应该进化得很慢，就像它们做什么事都很慢一样——长得慢，繁殖慢，新陈代谢也慢。

Of course we would have expected that the tuatara, which does everything slowly — they grow slowly, reproduce slowly and have a very slow metabolism — would have evolved slowly.

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通常来说，如果温度升高，雌性后代的出生率就会高一些。但鳄蜥的情况正相反，在更温暖的环境下，雄性后代的出生率更高。

However, while a boost in temperature generally results in a nest full of more females than males, the opposite is true for tuatara whose offspring skew toward male in warmer climes.

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他们发现，虽然刺背鳄蜥的大部分形态在长期的进化中并没有产生变化，但从DNA层面上看，它们比其他已经检测过的动物的进化速度都要快。

They found that, although tuatara have remained largely physically unchanged over very long periods of evolution, they are evolving - at a DNA level - faster than any other animal yet examined.

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新西兰鳄蜥就面临着这种孤独而又可怕的命运。一个新的研究表明，随着温度持续上升，这个濒临灭绝的爬行类动物到2085年时生育的后代可能都将是雄性。

With rising temperatures, this endangered reptile could produce all male offspring by 2085, guaranteeing its extinction, a new study finds.

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新西兰鳄蜥就面临着这种孤独而又可怕的命运。一个新的研究表明，随着温度持续上升，这个濒临灭绝的爬行类动物到2085年时生育的后代可能都将是雄性。

With rising temperatures, this endangered reptile could produce all male offspring by 2085, guaranteeing its extinction, a new study finds.

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