PROF. : Suppose we start trying to draw a map of the universe. If we put two dots on it.
为了说明他的观点,黑沃德博士建议画一个简单的宇宙图。
p1 p2 p3 Let me draw a map of this thing. p1, p2, p3 and I have my point q in the middle. Let's see.
让我把这个东西画出来3,和我的q点在中间,来看看。
This lets us draw a map of the high-level elements involved in the implementation of a set of use cases.
这令我们绘制出用例集合的实现中所涉及的高层元素的图表。
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