事情从不是这样。
In the real world, of course, it never works like that.
当然,在现实世界中,情况从来不是如此。
Once a player has moved up and you move him down again it never works.
一旦一个球员提升了,你再把他降级使用,这一点用都没有。
It never works the first time if it's a big program.
如果它是个大程序的话基本上。
So, let's see this eraser actually never works very well so I'm just going to draw below it.
这个清除器不能很好地运行,我将在下面画出它。
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