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[美容时尚英语] 几个步骤 让你拥有健康的牙龈
牙龈疾病是由于牙菌斑沿着龈线累积造成的。牙菌斑会释放出毒素，刺激牙龈，导致牙龈发炎。保持牙龈健康，预防牙龈疾病。2013-04-03 编辑：qihui
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[健康幸福] 享受美食 首先注意牙龈健康(视频+文本)
牙龈疾病是由于牙菌斑沿着龈线累积造成的。牙菌斑会释放出毒素，刺激牙龈，导致牙龈发炎。2014-10-01 编辑：qihui
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[新奇事件簿] 新奇事件簿(翻译+字幕+讲解+试题):牙龈疾病 口腔健康
A new study shows that people today have more gum disease than people living 2,000 years ago. The study is from the university King's College in London and is published in the 'British Denta..2015-04-25 编辑：alice
