translation.en: The other thing that whales do is that, as they're plunging up and down through the water column, they're kicking the phytoplankton back up towards the surface where it can continue to survive and reproduce.
translation.zh: 鲸鱼的另一个重要任务是 它们在水中上下穿梭游动 它们把浮游植物 重新搅动回水面 让它们继续存活和繁殖