1、 What is the largest city in the southern hemisphere?南半球上哪个城市最大？
2、 The Northern Hemisphere is the part of the world north of the equator， and the Southern Hemisphere is south of the equator、北半球是地球赤道以北的部分，南半球是赤道以南的部分。
3、 If you cut a round fruit into two， each half is a hemisphere、如果你把一个圆的水果切成两半，每一半就是一个半球。