contraction of the flow

例句：

1. 1.The temperature dropped significantly during the contraction of the ice sheet.
   冰盖的收缩导致温度显著下降。
2. 2.The physicist found that the contraction of water molecules was responsible for the expansion.
   物理学家发现，水分子的收缩是膨胀的原因。
3. 3. During the contraction, the muscles tightened and the heart rate increased.
   在收缩期间，肌肉紧绷，心率增加。