常見例句雙語例句The nerve roots in epidural space segments were enwrapped in spinal pia mater, arachnoid and spinal dura mater, and the thickness of capsule gradually increased as layers grew.硬膜外腔段神經(jīng)根被它所帶出的軟脊膜、蛛網(wǎng)膜和硬脊膜包裹，被膜厚度隨層次增加而增加。 返回 spinal arachnoid mater