条件筛选
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Why is chewing betel nut addictive? Should you spit it out, and how many can you eat at most in a day
Chewing betel nut has become a habit for many people. How to chew betel nut and whether you should spit it out is something everyone knows. Betel nut cannot be swallowed, it can only be chewed. Everyone says chewing betel nut is addictive, but why is it addictive? How many betel nuts can you eat at most in a day