海岸警卫营救队员们将几个人从破烂不堪的救生筏中救了出来，筏底已经不知去向，整个救生筏就如同一只巨大的黑色残破内胎。
Coast Guard rescuers airlifted the men from the mangled raft, which by then had also lost its floor and resembled a giant, battered black inner tube.
从这一阶段开始，该解决方案就适用自底向上的方法了，这意味着这个逻辑数据模型中仅仅将最重要和紧迫的业务主题领域锁定为目标。
Starting from this stage, this solution is adapting the bottom-up approach, which means that only the most important and urgent business subject areas are targeted in this logical data model.
如果上面的网布看起来呈拉伸或者撑起来的样子，那就说明脚在中底上打滑了，或者大底的花纹已经磨光了，就该买新跑鞋了。
If the upper appears pulled or stretched so that the foot is sliding off the midsole, or the grooves on the outsole are worn smooth, it's time for new running shoes.
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