“closed professional sports league”的概念、定义、翻译、参考文献-科学参考

单词	closed professional sports league
释义	closed professional sports league Encyclopedia 教育学职业体育机构释 closed professional sports league封闭式职业体育联盟不存在升降级制度、对球队预算硬约束和新球队准入实行严格控制的职业体育组织。
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科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。