1. The epistome is a specialized structure on the head of an insect.
上口是昆虫头部的一种特化结构。
2. She has an epistome for detail and always notices the smallest imperfections.
她对细节非常挑剔，总是能察觉到最微小的瑕疵。
3. The epistome on the fish helps with sensory perception.
鱼的幌须有助于感知环境。