He overlooked a spelling error on the first page.
他没有看出第一页中有个拼写错误。
The second sentence has a spelling error that needs correction.
第二句有个拼写错误需要纠正。
If you don't find a spelling error, check that the file really is where it's supposed to be by issuing a dir command like the one shown here.
如果没有发现拼写错误，请检查该文件是否处于它应该出现的位置，方法是按如下所示发出一个dir命令。
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