蓝鲸

lán jīng men de jì jié xìng qiān xǐ

蓝鲸们的季节性迁徙

the seasonal migration of blue whales

lán jīng shì zhè ge dì qiú shang zuì dà de bǔ rǔ dòng wù

蓝鲸是这个地球上最大的哺乳动物。

The blue whale is the largest mammal on the planet.