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YSK:ADA認爲 "中 "和 "硬 "牙刷是有害的,幾乎沒有人應該使用它們。
YSK: "Medium" and "Hard" toothbrushes are considered harmful by the ADA and almost no one should use them
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用中文在 know.buzzing.cc 瀏覽當前 Reddit小組 You Should Know 上最熱門的內容