It was challenging or impossible to have email available and synchronized when switching between different computers and platforms.
你如果换一台电脑，要把邮件系统用起来并做到同步非常困难甚至是不可能完成。
It was challenging or impossible to have email available and synchronized when switching between different computers and platforms.
你如果换一台电脑，要把邮件系统用起来并做到同步非常困难甚至是不可能完成。
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