Teachers have to constantly update their knowledge in order to maintain their professional competence.

教师必须不断更新他们的知识，以保持他们的专业能力。

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Clinical staff should maintain and update their knowledge and skills needed in pediatric emergencies.

临床工作者要保证拥有并更新儿科急诊所需的知识和技巧。

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Elementary knowledge are so simple that school teachers needn't to take trouble to update their knowledge.

基础知识都是很简单的，因此中小学的教育者没有必要专门更新知识。

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Houston InterWeb Design's flagship software, SiteBlazer, allows anyone to create and update their own Web site without needing any knowledge of programming tools such as HTML (hypertext markup language), he added.

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