有些时候，老师们不得不对一些匿名上传的教室录像中所指控的自己的不当行为作出辩解，但他们甚至都不知道自己是在何时被拍的。
In some cases, teachers have had to defend themselves against allegations of misconduct from schools following the anonymous Posting of classroom videos that they were not even aware had been filmed.
正如前面指出的，不管是专有采购辩解理由的存在，还是从多个已提交报价中作出适当选择，对于遵循董事会规则都是很重要的。
As noted earlier, it is important for compliance with board rules that either a justification for sole source exists or an appropriate choice is selected from multiple submitted bids.
正如前面指出的，不管是专有采购辩解理由的存在，还是从多个已提交报价中作出适当选择，对于遵循董事会规则都是很重要的。
As noted earlier, it is important for compliance with board rules that either a justification for sole source exists or an appropriate choice is selected from multiple submitted bids.
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