upper eyelid的用法和樣例：
例句
- Tears are secreted by an organ under the upper eyelid.
眼淚由上眼瞼下面的器官分泌。 - He had not lost the eye, but the upper lid was neatly sliced.
他保住了眼睛，但上眼瞼幾乎被切掉了。 - Conclusion Congenital ptosis can be effectively treated by maximum shortening of upper eyelid levator muscle.
目的探討重度先天性上瞼下垂的手術(shù)方法。
