结果表明，纯知识溢出存在时滞性。
The result indicates that there is spillover lags in pure knowledge spillovers.
如果不去客观而无功利思想地探求种纯知识，就不可能取得已有的实际成果。
The existing real achievement can't possibly be made if we don't objectively explore and research this kind of pure knowledge for no purpose of utility .
本文在企业层面上研究技术的租金溢出与纯知识溢出，刻画了这两种不同类型溢出之间的本质区别。
The present paper studies rent - spillovers and pure knowledge spillovers for a single firm and characterizes the essential difference between two kinds of spillover.
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