艾伦先生及其同事还作了其他的观察。某些猫科动物会周期性变成黑色例如大家熟悉的黑豹实际上是黑色的美洲虎。
The data seem to rule out one obvious explanation for melanism: the idea that black cats,with their unusual appearance, have more success hunting because their prey are notkeeping an eye out for predators that look like them.
这一观察似乎也排除了黑变论的解释。这种说法是,黑色猫科动物因其不同寻常的外表,而在捕猎方面非常成功,因为它们无须留神被猎物看见。
Melanic forms, though, are particularly prevalent in species with complicated livesthosethat inhabit a range of habitats, are active both day and night, and move between theground and the trees.
可是,黑色外表为各种复杂形式的物种所有,它们栖息在不同地带、有白天活动的也有黑夜活动的、有在地面生存的也有在树上生存的。
What advantage melanism brings in these circumstances is obscure.
在这些环境中表皮黑化到底有什么优势似乎模糊不清。
One for Kipling, perhaps. How the jaguar got his melanocytes.
这问题可能要交给吉卜林了:美洲虎为何是黑色?
词语解释
1.evolution n.进化;发展
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