So what makes this huge conveyer run?

那么是什么让这个巨大的输送机运转的呢？

Let me explain some of these in more detail. First, facial expression. Facial expression is a powerful conveyer of meaning.

我要更详细地解释这些。首先，面部表情。面部表情是传递意义的一种有力方式。

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。