The author also consider that the implied terms of contract is not only used for interpreting the contract, but also a means of limiting the parties' free ideas.

新通过的《合同法》并未借鉴系统的默示条款制度，只是在分则各种类合同之中规定了一些法定默示条款，而对事实上及习惯上的默示条款未作丝毫规定。

youdao

Such an agreement may be express or implied from the terms of the contract considered as a whole or from the surrounding circumstances.

上述协议可以是明示的或是被视为一个整体的合同条款或相关联的情况默示的。

youdao