membrane tympanic secundaria

例句：

1. 1. The inner ear contains the first and second membranes, which are essential for hearing.
   内耳包含第一和第二层膜，对听力至关重要。
2. 2. The second layer of the skin is called the stratum corneum, which protects the body from external factors.
   皮肤的第二层被称为角质层，它保护身体免受外界因素的侵害。
3. 3. In the study of biochemistry, the second membrane is a crucial component in understanding cellular processes.
   在生物化学研究中，第二膜是理解细胞过程的关键组成部分。