Imagine an airplane flying one millimeter above the ground
and circling the Earth once every 25 seconds
while counting every blade of grass.
Shrink all that down so that it fits in the palm of your ha
分类目录归档:magnetization
Imagine an airplane flying one millimeter above the ground
and circling the Earth once every 25 seconds
while counting every blade of grass.
Shrink all that down so that it fits in the palm of your ha