当合约义务完成时或不再需要支持服务时，可以终止对旧服务版本的支持。
Support for some older service versions may be dropped when the contractual obligation completes or when the need to support the service ends.
当合约义务完成时或不再需要支持服务时，可以终止对旧服务版本的支持。
Support for some older service versions may be dropped when the contractual obligation completes or when the need to support the service ends.
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