There needs to be more research on the harmful impact of tobacco; precise monitoring of the prevalence of tobacco use; and criteria need to be developed for evaluating tobacco control.

需要就烟草的有害影响开展更多的研究；准确监测烟草使用流行率；以及制定烟草控制评价标准。

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The National Chemical residue monitoring program is CFIA's main program for monitoring various species to determine the prevalence of residues of various compounds of concern.

国家化学残留监控计划是加拿大食品检验署监控各种物种的主要计划，以确定所担心的各种化合物残留的情况。

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Constant monitoring, overscheduling and protecting children from their own problems can come at a cost. Overprotection may be contributing to the rising prevalence of anxiety disorders among children.

持续监控、为孩子制定过多计划、不让孩子自己面对问题，这些做法最后都可能导致不良后果。过度保护可能是导致越来越多儿童有焦虑症的原因之一…

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