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SUPER SCIENCE

Helpful quills

作者:TEENS
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豪猪的刺不只是锋利!

Porcupines (豪猪) have sharp quills (刺). The quills can protect them. But these quills are more than just sharp. They can kill bacteria (细菌)! Sometimes, the quills can break and poke (刺) the porcupines themselves. But they don’t get hurt. 

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