Tabu table is used to deal with precedence and trail mutation rule is introduced to ensure that it is possible to reach the tabu point after tabu broken.

实现时，充分发挥禁忌表的禁忌作用，变在前约束为禁忌约束并引入信息素突变规则来实现禁忌点解除禁忌后的搜索道路畅通性。

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In the ensuing clashes, reports said more than 1,000 riot police were forced back by angry villagers, leaving a trail of overturned buses, broken glass and burned-out police cars.

报道说，在接下来发生的冲突中，有1000名防暴警察愤怒的村民被逼退了，只剩下掀翻的汽车，打碎的玻璃和烧坏的警车。

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The Knicks are gone now, leaving a trail of broken glass in Miami.

WSJ: Jason Gay: Lundsanity's No Passing Fad

Without effective strategies to deliver on the promises that led to expectations, speeches leave a trail of broken promises and unfulfilled hopes.

FORBES: Mr. President: Speeches Are Not Plans -- or Strategies

But, mindful of a trail of broken promises by recent Argentine governments, the Fund refuses to budge until its long list of preconditions is met.

ECONOMIST: Argentina