However, it is also vital that the infrastructure supports the substitutionof one service implementation by another with no effect to the clients of that service.
然而，基础架构支持在不影响服务的客户端的情况下由另一个服务实现替代原有的服务实现也是至关重要的。
2
I wouldn't be surprised if PCs are turning out to be more robust because of a bit of a substitutioneffect.
如果说因为一些替代效应的作用使个人电脑的性能正在变得更好，我不会感到惊讶。
3
To effect the substitution, the tool amends a running kernel image with the new functions' object code and injects a jump at the head of each existing function to call its new counterpart.