Objective: To explore the first-pass effect in Small intestine.
目的：探讨小肠在首过效应中的作用。
The only state to pass a bill requiring the vaccine for school entry is Virginia; it takes effect in October, after school begins, so will first apply in 2009.
弗吉尼亚州是唯一一个通过提案规定入学必须接种疫苗的州。该提案在十月份生效，那时学校已经开学，所以它首次应用将在2009年。
Objective To evaluate the characteristics of myocardial perfusion and therapeutic effect of acute myocardial infarction using first pass perfusion MR imaging.
目的采用MR首过灌注成像评价急性心肌梗死心肌组织血流灌注特点及治疗效果。
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