细柱层
Bacula memo: It comes by night and sucks the vital essence from your computers. 她随着黑夜而来临，吮吸你计算机上生死攸关的数据。
The nexine is thicker,but the structure of the bacula becomes hardly differentiation,it looks like sponge as a whole. 外壁内层较为厚实,但柱状结构分化不明显,整体呈海绵状;
