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Hygiene is the practice of keeping yourself and your surroundings clean, especially in order to prevent illness or the spread of diseases.
cleanliness , sanitation
Be extra careful about personal hygiene.
要特别注意个人卫生。
It was difficult to ensure hygiene when doctors were conducting numerous operations in quick succession.
当医生正在快速接连进行数个手术时，就难以确保卫生了。
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