Medical equipment and spare parts must be available and be properly maintained."

VOA: standard.2010.06.01

It's simply a distinction that can't be maintained, which is why he calls it an "event."

这个差别不容忽视，这就是为什么德里达称语言为事件“

耶鲁公开课 - 文学理论导论课程节选

And he argues that indigent citizens, who are unable to provide for themselves, should not be forced to rely simply upon the private charity of individuals but should be maintained at public expense.

对于那些因贫困而无法养活自己的人，他却认为不能让他们，完全依靠私人的慈善救济过活,而应当用国家公共支出,建立相应的保障来维持他们的生活。

耶鲁公开课 - 政治哲学导论课程节选

When the Financial Accounting Standards Board listens to what corporations are saying and helps them-- it adjusts these standards from time to time but it does have definitions that have to be maintained.

财务会计准则委员会,听取公司的意见并协助他们...,并且适时调整标准,不过有些规则始终如一

耶鲁公开课 - 金融市场课程节选