... watertight frame 水密肋骨 watertight frames 水密隔舱骨架 watertight generator 防水式发电机 ...
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The bark was stretched over frames made from tree branches, stitched together and sealed with resin—you know that the sticky liquid that comes out of the tree—and when it dries, it's watertight.
树皮在用树枝做好的框架中被拉长、延展，然后缝合在一起并用树脂密封好，就是那些从树中流出的黏黏的液体。当它干了以后就不漏水了。
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