I am no physicist, but I imagine you have all blown air over the top of an empty bottle and heard the sound it makes.
我不是物理学家,但我想你们都曾往一个空瓶子的顶部吹过气,并听到过它发出的声音。
Well I'm going to suggest that what I did was I really traded space for time. It makes me sound like an astro physicist somehow right?
困难在哪里?我在这里是如何权衡的?,我在这里所做的就是用空间换时间,这让我听起来像一个天体物理学家,是不是?
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