If you didn't have the foresight to embed some kind of version information, or sentinel values, this could get tricky.

如果您没有想到要嵌入一些版本信息或标志值，这就需要一些技巧了。

youdao

If you didn't have the foresight to embed some kind of version information, or sentinel values, this could get tricky.

如果您没有想到要嵌入一些版本信息或标志值，这就需要一些技巧了。

youdao