这些动物到底拥有什么样的感觉机能使得它们能对地震到来前的变化作出反应呢？
What is the sensory mechanism of animals that controls their responses to changes related to an impending earthquake?
通过跟踪骨头如何发育以及以什么样的顺序发育，可能会发现不同的基因是如何控制脊椎动物的全面发育的。
By tracking how bones develop, and in what order, it's possible to see how various genes control the overall development of vertebrate organisms.
直到最近人们才了解这种动物长什么样。
No one knew what the animal looked like until fairly recently.
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