最让我痛心的是那些曾经买过书、后来知道真相仍然为这个抄袭者辩护的读者。我一直认为读者上当受骗，就像消费者买了假冒伪劣产品，他没有任何责任。
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What if you create a truly unique routing profile that's wildly different from the common ones for which shortcuts were pre-calculated? The system is smart. If it detects that too many shortcuts (~50, for example) need on-the-fly recalculation and deviate significantly, it might determine that falling back to the original, comprehensive A* algorithm for the entire route would actually be faster than doing many small, heavily modified A* calculations.
This eruption episode sent fragments made of ash, pumice, and pieces of volcanic glass into communities, forcing highway closures and the evacuation of tourists.
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