The third and final stage was to lift the entire structure into the air, by which time the hull was also supported from below.
第三个阶段，也是最后一个阶段，是把整个建筑升到空中，这时船体也在下面起支撑作用。
The third and final stage was to lift the entire structure into the air, by which time the hull was also supported from below.
第三个阶段，也是最后一个阶段，是把整个建筑升到空中，这时船体也在下面起支撑作用。
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