Computers crash, hard drives fail, and sometimes, sadly, laptops are even lost or stolen.
电脑崩溃，硬盘损坏，甚至是笔记本丢失或被盗。
In a perfect world, this would be sufficient, but computers and software can crash, power can fail, and other unpredictable, catastrophic events can conspire to erase your work.
在一个完美的世界里，这就足够了。但是计算机和软件会崩溃，电源可能会断掉，其他不可预测的灾难会凑巧同时发生而丢掉你的工作。
That's why your operating systems and your personal computers often crash for no apparent reason. Just because two things happen to, once in a while, occur at the same time.
这就是为什么你的电脑或者操作系统，经常会毫无预兆的崩溃了，这是因为两件事情正好同时发生了，通常还有人工输入。
That's why your operating systems and your personal computers often crash for no apparent reason. Just because two things happen to, once in a while, occur at the same time.
这就是为什么你的电脑或者操作系统，经常会毫无预兆的崩溃了，这是因为两件事情正好同时发生了，通常还有人工输入。
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