而读取文件的代码应该检查这个版本号，以保证版本号小于或者等于当前版本，否则就会抛出一个异常。

And the code that reads the file should check to make sure that the version number is less than or equal to its current version and throw an exception if it's not.

youdao

而读取文件的代码应该检查这个版本号，以保证版本号小于或者等于当前版本，否则就会抛出一个异常。

And the code that reads the file should check to make sure that the version number is less than or equal to its current version and throw an exception if it's not.

youdao