Currently the world's oceans are criss crossed by a set of currents that act as a giant conveyer belt.

目前，世界上的海洋被一组充当巨大传送带的洋流纵横交错。

So the conveyer belt takes chemicals, takes nutrients around the world, which feed plankton, which feed fish, which feed us.

比尔：所以传送带带走化学物质， 带走世界各地的营养物质，这些营养物质喂养浮游生物， 喂养鱼类，喂养我们。