descending mesocolon

例句：

1. 1. During the descent, the temperature drops significantly.
   在下降过程中，温度显著下降。
2. 2.The patient was in a state of descending mesenteric spasm.
   患者处于下降的肠系膜痉挛状态。
3. 3.The surgeon performed an exploratory laparotomy to investigate the cause of the descending mesenteric spasm.
   外科医生进行了一次探查性腹腔镜手术，以探究下降的肠系膜痉挛的原因。