I can take this disk and put it here, and while it stays here -- don't move -- I will try to rotate the track, and hopefully, if I did it correctly, it stays suspended.
我能把这个磁片放在这里， 当它停留在这里--不要移动-- 我会尝试将轨道翻转， 希望，如果我做对了， 它会保持悬挂在半空。