1. The primary feathers are crucial for generating lift during flight.
初级飞羽在飞行过程中产生升力至关重要。

2. Scientists examined the structure of the bird's primary feather.
科学家们检查了这只鸟初级飞羽的结构。

3. A damaged primary feather can affect a bird's ability to fly.
受损的初级飞羽会影响鸟类的飞行能力。

A: Look at that eagle! Its primary feathers are so long.
A：看那只鹰！它的初级飞羽好长啊。

B: Yes, they are essential for its powerful soaring.
B：是的，它们对它强有力的翱翔至关重要。

1) 鸟类翅膀最外层的长羽

2) 参与飞行产生升力的关键羽毛

3) 鸟类解剖学中的专业术语

1. 初级飞羽

e.g. The primary feathers provide the necessary thrust.
初级飞羽提供了必要的推力。

noun

1. The long feathers located at the outer part of a bird's wing, essential for flight.