皮特•康拉德是第三位月球漫步者（亦是首位在月球上摔倒的人），他很清楚，（公众好奇心）的转变何其迅速。
Quite how quickly the shift can occur was learnt by Pete Conrad, the third man to walk on the Moon (and the first to fall over on it).
目的初步评价实时三维超声心动图在先天性心脏间隔缺损经皮心导管缺损封堵术围术期中的临床应用价值。
Objective To preliminarily evaluate the value of real-time three dimensional echocardiography (RT3DE) during the perioperative transcatheter occlusion of cardiac septal defect.
目的初步评价实时三维超声心动图在先天性心脏间隔缺损经皮心导管缺损封堵术围术期中的临床应用价值。
Objective To preliminarily evaluate the value of real-time three dimensional echocardiography (RT3DE) during the perioperative transcatheter occlusion of cardiac septal defect.
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