A contract is either bilateral or unilateral.

合同可以是双边的或单边的。

youdao

When tracing bilateral contract power flows, a fair objective function is introduced to avoid the multi-solution problem.

在双边交易潮流的追踪中，通过引入公平参照函数以避免多解问题。

youdao

On the author's opinion, a relational contract can be formed by two ways, one is asset specificity facilitating bilateral dependence and the other is individual social capital locking both parties in.

在笔者看来，关系契约有两条基本形成途径，一条是由专用性资产而形成的双方依赖，另一条是动用个体的社会资本而锁定双方的关系。

youdao

Despite the high jinks and copious drinking (or perhaps because of it), their large brains came up with a way of reducing risks for bond buyers: a bilateral contract that, for a fee, enabled investors to pass on the risk of default to another party.

WSJ: Give Some Credit to Credit-Default Swaps

Instead of a single bilateral contract, there will be two one between a clearing-house and the original seller, and the other between the clearing-house and the original buyer.

ECONOMIST: The risk in clearing-houses