名词
中文翻译：Unknown
同义词：
['oral hygiene', 'oral cleanliness例句：1. To maintain good oral health', 'it is important to clear the lips regularly.（为了保持良好的口腔健康，定期清除嘴唇是很重要的。）']
例句：
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1. To maintain good oral health, it is important to clear the lips regularly.
为了保持良好的口腔健康，定期清除嘴唇是很重要的。
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2.The dentist advised us to clear our teeth after every meal to prevent cavities.
牙医建议我们在每餐后刷牙以防止蛀牙。
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3. During the presentation, he cleared his throat and began speaking clearly.
在演讲过程中，他清了清嗓子并开始清晰地说话。