Learner's definition of HYGIENE
[noncount]
: the things that you do to keep yourself and your surroundings clean in order to maintain good health卫生 -
Poor sanitation and hygiene caused many of the soldiers to get sick.脏乱的卫生环境使得很多士兵患病。
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He has very poor personal hygiene.他很不讲个人卫生。
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Brushing your teeth regularly is an important part of good dental/oral hygiene.按时刷牙是保持牙齿/口腔卫生的重要组成部分。