科研之友
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<正>Have You Ever Wondered...你有没有想过……How does medicine know where you hurt?药怎么知道你哪儿受伤?When can pain be a good thing?什么时候疼痛是一件好事?Ouch! That hurts! Whether it’s a headache, an earache, sore shins from the soccer field, or a fall on the playground, we all feel pain from time to time.
