a. used of animals that move seasonally
a. 迁移的, 流浪的
1. Many birds are migratory and travel long distances to find warmer climates.
许多鸟类是迁徙的，会长途旅行寻找更温暖的气候。
2. The migratory patterns of whales are studied by scientists around the world.
世界各地的科学家研究鲸鱼的迁徙模式。
3. Some fish are also migratory, moving between freshwater and saltwater to spawn.
一些鱼类也是迁徙的，会在淡水和海水之间移动以繁殖。