Because it says, your program will still give you a value, but it may not be what you intended, and you can't always tell, and that may propagate it's way down through a whole bunch of other computations before it causes some catastrophic failure.

因为这意味着，你的程序依然会返回一个值，但是这个值可能不是你想要的，你可能还分辨不出来，而且这种情况会传播,结果会沿着正果计算过程传播下去,直到产生一个灾难性的错误。

麻省理工公开课 - 计算机科学及编程导论课程节选

But you know, sometimes what seems to be the virtuous may not necessarily be, so that would be an example.

但是现在你们知道了,有时候看起来低脂的食物并不一定低脂,这是个很好的例子

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

And,you may or may not be intested in the motion, as I am, but you might say: what is the signal good for?

对于情感来说，你们或许有兴趣，也有可能和我一样觉得没意思，但你会问，这种信号什么用处？

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What you really want-- a ruler may not be enough, but maybe it's enough.

你还需要什么,一把尺子也许还不够,但可能也足够了

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