pronotal carina

例句：

1. 1. The butterfly's pronotum is covered in delicate scales.
   蝴蝶的前胸板上覆盖着精致的鳞片。
2. 2.During mating season, the male moth has a distinctive pronotal carina.
   在交配季节，雄性蛾有独特的前胸板褶皱。
3. 3. The caterpillar's pronotum is soft and flexible, providing protection during its development.
   幼虫的前胸板柔软且灵活，在其发育过程中提供保护。