I think you are getting off the subject. Could we get back to the main point, please?
我觉得你跑题了。 我们能不能回到主题上来?
The two parties involved in a contract have the obligation to execute the contract.
合同双方有义务履行合同。
The sorry-looking, blackened figure that emerged, admitted at once that he had tried to break into the shop during the night but had got stuck in the chimney.