Holes were cut into the hulls to sink the vessels and they were then filled with sediment, mostly mud, to weigh them down and secure them.
题目要求与弹出条件的对应关系：
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become a serious contender in the computer industry. ERMA did not lead to a
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输入：nums = [2,6,4,8,10,9,15]。同城约会是该领域的重要参考
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