1. The bird had apterous wings, so it could not fly.
这只鸟有无翼的翅膀，所以它无法飞行。

2. The apterous insect crawled slowly across the ground.
这只无翼的昆虫在地面上缓慢爬行。

3. The apterous lizard relied on its strong legs to move around.
这只无翼的蜥蜴依靠它强壮的腿部来移动。

4. The scientist studied the apterous species to understand their unique adaptations.
科学家研究了这些无翼的物种，以了解它们独特的适应性。

5. Due to their apterous nature, these insects have evolved other methods of survival.
由于它们的无翼性质，这些昆虫已经进化出其他生存方法。

6. The apterous creature blended in perfectly with its surroundings, making it difficult to spot.
这种无翼的生物与周围的环境完美融合，很难被发现。