好了，我该…你们该怎么理解他们？坐标图是一种方法；矢量图是另一种非常重要的方法。
Ok, so how do I... how do you understand them? The row picture is one way; the column picture is another very important way.
好了，我该…你们该怎么理解他们？坐标图是一种方法；矢量图是另一种非常重要的方法。
Ok, so how do I... how do you understand them? The row picture is one way; the column picture is another very important way.
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