The commonality between them is that they all have a lot of implicit assumptions and implicit state that would have to be dealt with explicitly in a general-purpose programming language.
它们之间的共同点是：它们都具有许多隐式假设和隐式状态，而在通用编程语言中必须显式地处理这些东西。
2
Implicit in the revised practices list (which contains 19 practices instead of 12) is the recognition that XP is, in fact, about more than programming.