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。
This Contract shall supersede all previous communications, either oral or written between the parties.
本合同取代双方以前所有的口头或书面通讯。
This Contract shall supersede all previous communications, either oral or written, between the Parties.
本合同取代双方以前所有的口头或书面通讯。
This Contract shall supersede all previous communications, either oral or written, between the Parties.
本合同取代双方以前所有的口头或书面通讯。
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