When the warm ocean current El Ni?o replaces the cooler Peruvian, or Humboldt, current along the coast of Peru, the supplies of anchovies on which sea birds feed decrease.

• 当暖洋流厄尔尼诺取代秘鲁沿岸的冷洋流时，作为海鸟食物的凤尾鱼的供应就会减少。