prevention /prɪˈvɛnʃən/ noun Learner's definition of PREVENTION
[noncount]
: the act or practice of stopping something bad from happening : the act of preventing something预防;防止 -
Exercise and diet play a role in the prevention of heart disease.锻炼和健康饮食有助于预防心脏病。
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crime/fire prevention预防犯罪/火灾
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(US) an ounce of prevention is worth a pound of cure = (Brit) prevention is better than cure [=it is better and easier to stop a problem, illness, etc., from happening than to stop or correct it after it has started]预防优于补救