These are performance contracts, and it's a quite interesting research area.
这些都属于性能契约，也是一个让人颇感兴这些契约属于趣的研究领域。
The research of performance of contracts is the front area of the theory of contracts.
合约的执行问题是当前合约理论研究的前沿领域。
The research of performance of contracts is the front area of the theory of contracts.
合约的执行问题是当前合约理论研究的前沿领域。
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