在某个阶段，他们会开始注意有意义的重合，并缩小选择范围。
At a certain stage they begin to notice meaningful overlap and narrow down the choices.
精基准选择：要符合基准重合原则，尽可能选设计基准或装配基准作为定位基准。
Fine datum choice: Must conform to the datum superposition principle, chooses the design datum or the assembly datum as far as possible takes the localization datum.
你必须在现实和小说之间作出选择，它们可以无限接近，但永远不会重合。
You have to choose between life and fiction, the two are very close, but they're never the actually touch.
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