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Q:在建筑工地上,货运码头边,我们总能看到吊车的身影、巨大的铁钩轻轻一挥、各种笨重的建筑材料和货物就像积木一样被提到半空。我发现牵拉
Q: On the construction site, near the freight terminal, we can always see the crane. The huge iron hook gently waves. All kinds of bulky construction materials and goods are just like the blocks mentioned in the air. I found pulling