通过减少传播到最终用户失败的数量，可以减轻运营负担。
This can ease the operational burden by reducing the number of failures that bubble up to end users.
自从巴塞罗那与马德里之间的高铁2007年开始运营以来，往返于两地之间的航班数量已经减少了一半。
The number of flights between Madrid and Málaga has dropped by half in the two years since the AVE route between those cities opened in 2007.
当恰恰是因为同一服务的多个变种而导致服务数量增加，而成为了消费者，运营者和提供维护的痛楚之时，版本管理就显得必要了。
Versioning will become required when the number of services that are just multiple variants of the same service becomes a pain for consumers, for operations and for provider maintenance.
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