early homo, they say, might have based his first words either on the noises he heard, like the splash of falling water or the thud of a rock smashing into a skull;
他们声称，早期人类的第一个词也许要么基于他所听到的噪音，像是溅水的声音，或者岩石敲击头骨的声音；
My lanky fifteen year old body smashes into the windshield, flips lifelessly over the roof of the car, and strikes the concrete with a sickening thud.
在这里输入译文我15岁的瘦得出奇的身体重重地撞在汽车挡风玻璃上，然后在车顶上无力地轻轻弹起后，随着砰的一声闷响，我结结实实地摔在了地上。
A sharp crack might remain fairly sharp in granite, but degenerate into a dull thud in sand.
在花岗岩中尖锐的破裂声可以保留相当的强度，而在砂岩中则易变成低沉的轰响。
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