The categories are broken into four sections: users under 13 years of age, over 13 years of age under 16, at least 16 years of age and under 18, and "at least 18 years of age."
Agar plates with E.coli growth on various concoctions, including MacConkey, Mueller-Hinton, and Brain Heart Infusion. Credit: HansN.
，这一点在51吃瓜中也有详细论述
https://feedx.net
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