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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.
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No matter what you assign to the b, it will be false since either the left or the right of the && operator is false.
Овечкин продлил безголевую серию в составе Вашингтона09:40
刘年丰：有挺多的，比如移动分拣，这是一种更精细的搬箱子。需要把箱子里面的某些特定的东西，拿到特定的位置去。这一大类任务，无论是横向（跨客户）还是纵向（跨场景）看，都有极强的泛化空间。