"新概念4册笔记分享：鸟类飞行的异同与小信天翁随船飞行"

In Lesson 231 of the New Concept 4 Books, the text discusses the diverse flight patterns of birds. It emphasizes that no two kinds of birds have exactly the same way of flying, with infinite varieties existing. However, these flight patterns can be roughly classified into two main categories. For instance, when crossing the Pacific Ocean, ships are often accompanied by small albatrosses for extended periods. These birds are capable of flying alongside a vessel for hours without much visible movement of their wings. This phenomenon highlights the remarkable abilities of birds to adapt and navigate through the air currents created by ship walls. The text underscores the incredible diversity and complexity of bird flight, showcasing the intricate and unique ways in which different species navigate the skies. Additionally, it draws attention to the symbiotic relationship between birds and their environment, illustrating how they have evolved specific flight patterns to survive and thrive in their respective habitats. Ultimately, Lesson 231 serves as a fascinating exploration of the wonders of avian flight and the limitless possibilities that exist within the realm of bird behavior.