Answer queries if user id is allowed for requested Service id (contract element).

如果用户标识得到使用所请求的服务标识(合同元素)的许可，则对查询作出答复。

youdao

There are also loop invariants and a few others, but pre contract element condit- and post-conditions and class invariants are really the basic fabric of contracts.

还有循环契约要素条件不变式等等，但前置、后置条件和类不变式是基本要素。

youdao

A service contract is binding on all participants in the interaction, including the service itself and the element that provides it for the particular interaction in question.

在交互过程中，服务契约与所有参与者进行绑定，包括服务本身和为特定的交互活动提供服务的元素。

youdao

"The problem is if you isolate, as this report did, one particular element of that contract, it seems to distort the cost to the taxpayer without recognising the changes that have occurred in recent times, " he said.

BBC: Police officers (unidentified)