A microwave oven heats food very fast.
微波炉加热食物特别快。
It sends tiny invisible waves into the food.
它往食物里发射小小的、看不见的波。
The waves make water molecules dance.
这些波让水分子跳起舞来。
Dancing molecules bump into each other and get hot.
分子互相碰撞，就变热了。
Most food has water inside, so it gets hot.
大多数食物都含水，所以就被加热了。
That is the secret of the microwave.
这就是微波炉的秘密。
