例如，想想从一个仅在Solaris上遇到的文件中提取信息的脚本；想像使用一个在Linux系统中不可用的标志执行一个系统命令。

For example, think about a script that extracts information from a file that is encountered only on Solaris; imagine executing a system command that USES a flag that is not available on Linux.

youdao

将数据从此文件中提取出来是轻而易举的，但在该PHP文件中调整数据却很困难，在一些情况下甚至是不可能的。

It's trivial to get the data out of this file, but it's hard — even impossible in some circumstances — to adjust the data in the PHP file.

youdao

这使得目前提取这具木乃伊的DNA变得近乎不可能。

This had made it near impossible to extract DNA from the mummy until now.

youdao