ประโยคภาษาจีน : 中文句子 |
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yí xiàng 一项 diào chá 调查 xiǎn shì 显示 diàn dòng yá shuā 电动牙刷 zài 在 jiǎn shǎo 减少 chǐ 齿 jūn bān 菌斑 hé 和 chǐ yín yán 齿龈炎 shàng 上 gèng 更 yǒu xiào 有效 |
Review of studies from the past four decades found electric toothbrushes were more effective than manual alternatives in reducing plaque and gingivitis. |