在春季，北极燕鸥沿着曲折的路线返回格陵兰群岛。

Arctic terns also follow a zigzagging route on their spring trips back to Greenland.

youdao

在春季，北极燕鸥沿着曲折的路线返回格陵兰群岛。

Arctic terns also follow a zigzagging route on their spring trips back to Greenland.

youdao