求翻译：One more thing, 21 students have given their presentation in class,make sure their names and slides are correctly recorded.是什么意思？

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悬赏分：1 - 离问题结束还有

One more thing, 21 students have given their presentation in class,make sure their names and slides are correctly recorded.

问题补充：

匿名	2013-05-23 12:21:38 还有一件事，21名学生在课堂上给他们的介绍，确保正确记录他们的名字和幻灯片。

匿名	2013-05-23 12:23:18

匿名	2013-05-23 12:24:58

匿名	2013-05-23 12:26:38 一件事，21 学生在类中给予他们的演示文稿，请确保正%E

匿名	2013-05-23 12:28:18

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