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。

麻省理工公开课 - 计算机科学及编程导论课程节选

Let me remind you of that other intrusive moment in the poem, the moment when a figure whose presence we hadn't been aware of suddenly made -suddenly asserted himself.

我来提醒一下你们，诗里有另外一个被侵入的时刻，一个我们仍未可知的，突如其来的角色,突然出现的时刻,他毫无预兆的将自己安插进来。

耶鲁公开课 - 弥尔顿课程节选