For example, if you accidentally touch a hot stove, the nerves in your skin shoot a message of pain to your brain. The brain then sends a message back telling the muscles in your hand to pull away.
比如你不小心碰到了热火炉,你皮肤中的神经就会向大脑发射疼痛信号,于是大脑就会发回信号让手挪开。
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