YSK: "Medium" and "Hard" toothbrushes are considered harmful by the ADA and almost no one should use them
from /r/YouShouldKnow
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: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
from /r/YouShouldKnow