Restraint leel was quantified by use of fluid-filled epicardial balloons placed around the entricles and measurement of balloon luminal pressure at end diastole. 用充满液体的心脏外球囊包绕在心室外面，通过测量舒张末期的球囊内压力来量化限制扩张的程度。
Relations had become especially frosty towards the end of Mr Bush's presidency when war broke out between Georgia, an ally of America, and Russia. 在布什任期进入末期的时候，美国同盟国格鲁吉亚与俄罗斯爆发了战争，美俄关系曾一度变得特别僵硬。
