retrorse leaf

例句：

1. 1. The scientist observed the plant's unique retrorse leaf structure.
   科学家观察到了这种植物独特的反折叶结构。
2. 2. The ancient tree had a retrorse leaf that was used for medicinal purposes.
   这棵古老的树有一个反折叶，被用来做药用。
3. 3.The botanist studied the physiology of the retrorse leaf, which is found on many tropical plants.
   植物学家研究了反折叶的生理学，这种叶子在许多热带植物上都有。