make knowledge of hygiene widely available宣传: conduct propaganda; propagat ...卫生知识: hygienic knowledge卫生知识: health information学生知识的发展: academic development卫生宣传: health propaganda下载手机词典可随时随地查词查翻译关注微信公众号:chachacidian,回复:宣传卫生知识,即可在微信中查询翻译