而这些行不含任何有用值，这些有用值只能在描述同一版本的其他行中找到。

These rows do not contain any useful value that would not be found in the other rows describing that same edition.

youdao

所以，如果你需要用数学式子计算一个值，那就只有用表达式返回这个值，没有其他语法结构可用，因为否则就无法处理这个值。

And so while you needed expressions for math to work, there was no point in making anything else return a value, because there could not be anything waiting for it.

youdao

在编写自己的检测器时，打印出它们的值通常是有用的。

When writing your detectors, it's often useful to print the values for them.

youdao

But it's a valuable thing. It says, in each case, I return some useful value from this procedure.

但是这就是变量，是在每个例子中，我从这个程序中返回了一些有用的值。

麻省理工公开课 - 计算机科学及编程导论课程节选

Now, this is not the nicest way to do it but it'll work. I can look at the type of the value of base and compare it to the type of an actual float and see, are they the same?

这不是最好的办法但它确实有用,我可以得到底的值的类型然后,和一个真的浮点数的类型比比,看他们是不是一样？

麻省理工公开课 - 计算机科学及编程导论课程节选