Permissions were based on masking a 32-bit integer — the example application and requirements would have needed at least 64 bits to handle the required atomic permissions.

各种权限都基于屏蔽一个32位整数——示例应用程序和要求至少需要64位才能处理所需的原子权限。

youdao

Some processors can handle unsigned integer arithmetic considerably faster than signed (this is also good practice, and helps make for self-documenting code).

一些处理器在处理无符号整型数要比处理符号整型数快得多，这也是一个好的习惯，有利于代码的自我文档化(self - documenting)。

youdao

You could also try reversing an integer. However, if you have solved the problem "reverse integer", you know that the reversed integer might overflow. How would you handle such case?

也许你在试着通过反转这个整数来解决，然而，如果你用反转整数来解决这个问题，你知道反转可能会造成越界，怎么来处理这种情况？

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