“tourism safety and security”的概念、定义、翻译、参考文献-科学参考

单词	tourism safety and security
释义	tourism safety and security Encyclopedia 理学旅游安全释 tourism safety and security旅游安全旅游系统（包括特定的社会行为主体或特定的旅游事物）可以容忍的风险程度。
随便看	sum of squares within classes sum of submodules sum of subspaces sum of the digits sum of vectors sum operator sum over state sum over states sump sump level control for hydrocyclone feeding process sum-product number sumption sum relation sum rule sum rules sum sequence sum series sum-set sum-set axiom sum spectrum SUMT sum term sum test sum theorem sum theorem for dimension

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