At a minimum, the existence of a contract would serve as an authorization check; without a valid contract, the service cannot be invoked.

最低限度，合同的存在将起到授权核查的作用；如果没有有效的合同，将不能调用服务。

youdao

The previously described scenario results in a set of incompatible changes that requires that the major version number of the Policy Check service contract be incremented from 1.0 to 2.0.

之前描述的场景会引发一组非兼容性变更，所以需要更改Policy Check服务契约的大版本号，使其从1.0转变成2.0。

youdao

The service requester has to check the Web site of ArcWeb Services on "data sources and credits" to understand available data sources that are not contained inside the contract.

服务请求者不得不检查ArcWeb服务的Web站点“关于数据源和信用”来了解未包含在协议中的可获取数据源。

youdao

Like all Mobilicity devices, it does not come with a handset tab credit check, nor does it come with a contract to lock a customer into a multi-year service plan, as is often the case with Canada's incumbent carriers.

ENGADGET: Sharp Mobiflip channels Sidekick LX's vibes for Mobilicity