Musculus bulbocavernosus

例句：

1. 1. The muscles in his arms are so strong that he can lift heavy objects easily.
   他的手臂上的肌肉如此强壮，以至于他可以轻松地举起重物。
2. 2.Muscles are essential for maintaining good posture and preventing back pain.
   肌肉对于保持良好的姿势和预防背痛至关重要。
3. 3. The scientist studied the structure and function of muscles to understand how they work.
   这位科学家研究了肌肉的结构与功能，以了解它们是如何工作的。