The engagement is informal contract.
婚约为不要式契约。
If you just write an informal contract with a referee, you can make the recipient whomever you want.
如果你只是同相关人士订立一份非正式合约，你可以选任何人做你罚金受益人。
Lord Moonie said he had an "informal conversation" about advising the lobbyists, but had not signed any contract.
穆尼议员说，他有过一个“不正式的交谈”关于游说者的建议，不过没有签署任何合同。
This is, perhaps, because the business service contract is incomplete or that there is only an informal sketch of the business requirements.
也就是说，或许因为业务服务契约不完全，或者只有业务需求的概略信息。
A contract might be formal or informal. oral or written.
一个合同可以是正式或者非正式的，口头的或者书面的。
Once you have reached informal agreement, you should enter into a contract with the other party.
一旦达成非正式协议，就应该和对方签定合同。
Once you have reached informal agreement, you should enter into a contract with the other party.
一旦达成非正式协议，就应该和对方签定合同。
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