falciform stripe

例句：

1. 1.The scientist found a falciform stripe on the fossilized fish.
   这位科学家在化石鱼身上发现了腹鳍条带。
2. 2. The falciform stripe on the butterfly's wings is unique to its species.
   蝴蝶翅膀上的腹鳍条带是其物种特有的。
3. 3. The paleontologist discovered a falciform stripe in the rock layers, which could indicate an ancient marine creature.
   古生物学家在岩石层中发现了一个腹鳍条带，这可能表明是一种古代的海洋生物。