Shortcuts: For common scenarios, we pre-calculate the travel time/distance (the "shortcut") between border points within the same cluster and also to border points of immediately adjacent clusters.
對於指控，中國外交部發言人毛寧在26日例行記者會上回應：「我不清楚你所提到的情況，也看不到這一指控的任何依據。」
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In 1986, the Challenger spacecraft suffered a catastrophic failure seconds after launching, killing all seven crew members on board.