心脏舒张期

例句：

1. 1. During the heart's diastolic phase, the blood pressure drops significantly.
   在心脏的舒张期，血压显著下降。
2. 2. The doctor explained that the patient's heart was in a state of relaxation during this period.
   医生解释说，患者在这段时间内心脏处于放松状态。
3. 3. During the diastolic phase, the heart's chambers fill with blood, preparing for the next contraction.
   在舒张期，心脏的腔室充满血液，为下一次收缩做准备。