美国的鲶鱼养殖户几十年前引进了亚洲鲤鱼用来消灭池塘中的藻类，一部分亚洲鲤鱼逃到野外并游向密西西比河。

Catfish farmers in the U.S. imported Asian carp decades ago to eat up the algae in their ponds; the fish slowly escaped into the wild and have been making their way up the Mississippi River.

youdao

美国的鲶鱼养殖户几十年前引进了亚洲鲤鱼用来消灭池塘中的藻类，一部分亚洲鲤鱼逃到野外并游向密西西比河。

Catfish farmers in the U.S. imported Asian carp decades ago to eat up the algae in their ponds; the fish slowly escaped into the wild and have been making their way up the Mississippi River.

youdao