The study will then go on to assess the role PR, and in particular SNSs, have in cultivating social capital and the role stakeholders play in this process.
本研究将继续评估PR的作用，并在特定的社交网站，在培育社会资本和利益相关者的过程中发挥作用。
Objective To study the influence of abnormal PR interval on mitral regurgitation and left ventricular filling.
目的探讨异常PR间期对舒张期和收缩期二尖瓣返流的影响及对左心室充盈的影响。
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