走在科技馆里,在一处特别的地方,你会看到低空中不时地飘起球来。这可不是什么魔术或杂技,而是一件名为旋转飞球的展品。展台中分别有三个直径不同、方向不同、长短不同的管子,两个竖直一个倾斜。当按动对应的按钮后,管子里会不断有空气“喷发”出来。这时,我们可以选择不同大小和材质的球放在 Walk in the science and technology museum, in a special place, you will see the ball floating in the air from time to time. This is not magic or acrobatics. It is an exhibit called a spinning ball. There are three tubes with different diameters, different directions, and different lengths in the booth, two vertical and one inclined. When the corresponding button is pressed, there will be continuous air “eruption” out of the tube. At this time, we can choose different sizes and materials for the ball