If you read a number from a file and expect it to be positive, check that it is before further processing with that number.

如果从文件中读入一个数字并期望其为正数，那么，在使用其进行进一步处理前对其先验证一下。

youdao

I have file drawers filled with positive, grateful personal comments like these.

我的好几个文件抽屉都塞满了像上面那样正面的、充满感激的个人评论。

youdao

“But negative trials took an extra two to four years to be published,” he noticed. “Negative results sit in a file drawer, or the trial keeps going in hopes the results turn positive.”

“但‘负面的’诊断用了额外的两年或四年时间才被披露，”他提醒道，“‘负面的’诊断文件躺在抽屉里，或者希望这些‘负面的’诊断会转为‘正面的’诊断而被继续进行。”

youdao

Mr Payne, whose organisation represents rank-and-file officers, said it was a positive thing "that we have two independent candidates who seem to agree with each other".

BBC: Warwickshire and West Mercia PCCs back sharing services