作为媒介的软件是有延展性的，2以至于很容易快速进行根本的变更，并且与此同时很快引入新的风险。
Software as a medium is so malleable 2 that it's easy to make radical changes quickly, and at the same time introduce new risks quickly.
因此，可追溯性信息根本没有建立，或只是敷衍的建立，而且您失去了提高质量并且快速响应变更的机会。
As a consequence, traceability information is not established at all or only halfheartedly, and you lose the opportunity to improve quality and to respond changes quickly.
除非是根本性的变更，都应该有可能对服务进行版本控制，使其不破坏与现有客户端的兼容性。
Barring fundamental changes, it should be possible to version services without breaking compatibility with existing clients.
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