因为一般用途语言（如C#）不能告知你它的使用方法，用什么描述特定问题，缺乏对边界的定义，因为它可描述问题的范围实在是太宽广了。

That's because the general purpose language (like C#) does not tell you how to use it or what it should be used to describe, it has no bounds. The domain of things it can describe is so vast.

youdao

一般来讲，在标准中，实现者期望解决的问题已经得到了适当定义并确定了范围。

Traditionally, in a standard, the problems implementors are expected to solve are reasonably well-defined and scoped.

youdao

对于每个行为，我们一般会运行一个加上边界范围极限的测试用例，因为这个经常是出问题的地方。

For each behavior we normally test a typical case plus the extremes of each range because this is often where things go wrong!

youdao