text_1: 约 2 / 3 的 患者 为 NYHA 心功能 分级 Ⅱ 级 , 平均 射血 分数 为 31% , 平均 收缩压 为 122 mmHg .
  
text_2: about two thirds of the participants were in NYHA class II , mean ejection fraction was 31 % , and mean systolic blood pressure was 122 mm Hg .
  