现实告诉我，那个不可能的人，该忘了。

Reality tells me that the impossible, it should be forgotten.

youdao

现实告诉我们：梦想就要行动，行动就要坚持。

Reality tells us: the dream is about to action, must insist on.

youdao

但是，随着时光的流逝，现实告诉我我的遨游太空的梦想或许不会实现。

But as the years went by, my realistic side told me that my dream of flying in space would not be fulfilled.

youdao

But one of the teaching fellas also passed long to us recently, a little real world example of what happens when you're not mindful of various data types and you're not mindful of the imprecision that's inherent in representing data in a computer, at least using a language like C and low level primitives like floats and even doubles.

最近有个助教告诉我们，一个现实世界中的例子,当你不注意各种各样的数据类型,也不注意在计算机中表示数据时,其内在的不精确性，至少在用像C语言,和float甚至double型数据时，那将会发生什么？

哈佛公开课 - 计算机科学课程节选