undulating membrane

• 波形膜,波状膜,波动膜

undulating membrane的用法和样例：

例句

1. What is embedded in the thylakoid membrane of the chloroplast and protruding as knobs from the outer surface?
   下列何者镶嵌在叶绿体的囊状膜上，且从外表看起来向外突出？