易混淆的单词： Hemispheres

The cerebrum has two halves , or hemispheres .

大脑有两半部分或两个半球组成。

It covers all four hemispheres .

它涵盖着地球上全部四大半球。

Their brain hemispheres take turns so they can continue surfacing to breathe .

它们的大脑两个半球轮流值班，这样它们能够浮到水面来呼吸。

In both hemispheres the climate system shifts heat from the steamy equator to the frozen pole .

通常赤道上空的水蒸气将热量带到南北两个半球冰冷的极地。

This means that different hemispheres are exposed to different amounts of sunlight throughout the year .

这意味着一年里，不同的半球会受到不等量的阳光照射。