柯林斯詞典petrel /?p?tr?l/ (petrels) 1. N-COUNT A petrel is a type of sea bird that often flies a long way from land. There are many kinds of petrel. 海燕 返回 petrel劍橋詞典a bird with a curved beak that spends most of its life flying over the sea 海燕 返回 petrel