Koch pouch

例句：

1. 1. The scientist kept a Koch pouch filled with samples of the unknown substance.
   科学家保持一个装满未知物质样本的科赫囊袋。
2. 2.The policeman used his Koch pouch to keep track of all the evidence collected during the investigation.
   警察用他的科赫囊袋来记录调查期间收集的所有证据。
3. 3. The veterinarian carried a Koch pouch containing antiseptic solutions for treating animal bites.
   兽医携带一个装有抗生溶液的科赫囊袋，用于治疗动物咬伤。