high and low altitude of USA-美国的高纬度和低纬度

In the case of the altitude of the United States. State of Colorado is the symbol of high altitude and the Hawii that of low one.

speed of high and low-速度的快慢

Here we're talking about the running speed: the turtle is the symbol of the much lower one if it is being compared by that of  the leopard.This couple stamps show the high and low example in the nature world.

sports related with high & low-和高与低有关的运动

The content of the stamps shows two different kinds of sports. One is high jumping, the another is diving under the water. Their actions and movements explain well the theme of high & low.