nesting level

例句：

1. 1.The bird's nesting level is crucial for its survival.
   鸟类的筑巢水平对其生存至关重要。
2. 2. The study of nesting patterns can help us understand the behavior of birds.
   研究筑巢模式可以帮助我们理解鸟类的行为。
3. 3. The researcher found that the nesting level of the species had increased over time.
   研究者发现该物种的筑巢水平随着时间的推移有所提高。