形容词
中文翻译：不可执行的
同义词：
['unenforceable', 'unexecutable']
例句：
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1. The contract is nonenforceable due to lack of proper execution.
由于执行不当，这份合同是无效的。
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2. The agreement was nonenforceable because the parties failed to meet their obligations.
由于双方未能履行义务，这份协议是无效的。
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3. The terms of the agreement are nonenforceable as they were not signed by all parties involved.
由于所有参与方都没有签字，这些条款是无效的。