用户通过点击上移和下移箭头进行选择。
你怎样才能让这些爱心看起来是在随机的模式中上下移动呢?
How do you get these hearts to move up and down and seemingly in random patterns?
如果这里有一个马达,使桨上下移动,就可以在水槽的一端形成波浪,从左到右扩散。
If you had a motor here that was causing a paddle to move up and down you could cause waves to form at one end of the tank and move from left to right.
So let me move down the list or put this cup back.
在列表中继续向下移,将这个杯子放回去。
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