pia-arachnoid

例句：

1. 1. The doctor found asmall piece of tissue that resembled thepia-arachnoid.
   医生发现了一片组织，它看起来像是蛛网状组织。
2. 2. Pia-arachnoid is a common type of connective tissue in the brain.
   蛛网状组织是大脑中常见的一种结缔组织。
3. 3. The patient was taken to the operatingroom for further examination of the pia-arachnoid.
   病人被送往手术室，对蛛网状组织进行了进一步的检查。