如果: if; in case; in the event of ...一方: one side; a party不: a block of wood执行: carry out; execute; implemen ...合同: agreement; contract如果一方不履行合同: generally speaking a contract cannot be changed after it has been signed by both parties; one party is entitled to cancel the contract if the other side cannot execute it如果一方不履行合同协议: if one side fails to observe the contract the other side is entitled to cancel it; the loss for this reason should be charged by the side breaking the contract待执行合同: executory contract执行合同: execution of contract; performance of contract; to carry out a contract; to execute/implement/fulfil/perform a contract; to perform a contract执行合同,履行合同: break a contract恢复执行合同: recovery of performance; recovery of the performance不执行: cancel不执行操作: undo拒不执行: refuse to implement不履行合同: back out of contract; back out the contract; breach of contract; non-execution; non-performance of the contract; nonperformance of contract待履行合同: executory contract履行合同: comply with an agreement; fulfil a contract; performance of a contract [obligation]; carry a contract; discharge a contract◇履行合同保证人 performance guarantee; 履行合同风险 performance risk; 履行合同义务 obligation of contract; 履行合同责任 burden of contract未履行合同: failure of performance; failure to perform已履行合同: executed contract运行合同: operational contract执行合伙人: executive partner; managing partner不执行生效判决: unsatisfied judgment如果一等品无货: if grade a is not available grade b will do如果一定要证明: if only just to prove不履行合同险: risk of nonperformance