单词
toothed
读音
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英式
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齿状的
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from the mastodon to the giant ground sloth,saber-toothed cats,all of these cool animals that unfortunately are no longer with us.
leading to alligator-like amphibiansand saber-toothed protomammals.But then, volcanoes erupted all over Siberia,
lack of resources,maybe a saber-toothed tiger,all of these things working
which use hairy baleen plates instead of teeth to trap their prey.Meanwhile, toothed whales do use echolocation,and they and other species of baleen whales
because I want to engage your brains in this.So this is a toothed wheel.It's got a bunch of notches and it's got a bunch of teeth.
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