modification of exe-cutory contract
Modification of exe-cutory Contract待履行合同的变更 A promise modifying a duty under a contract not fully performed on either side is binding任何一方都未完全履行的合同，许诺...
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modification of exe-cutory contract
执行合同的变更
以上为机器翻译结果，长、整句建议使用 人工翻译 。