[mass noun]conditions or practices conducive to maintaining health and preventing disease, especially through cleanliness 卫生;保健 poor standards of food hygiene. 糟糕的食品卫生标准。 personal hygiene. 个人卫生。
语源
late 16th cent.: via French from modern Latin hygieina, from Greek hugieinē (tekhnē) ('art) of health', from hugiēs 'healthy'