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坑道开凿
Tunnel excavation
以上为机器翻译结果,长、整句建议使用 人工翻译 。
她说:“让我们怀疑的是,他们为什么要开凿如此庞大的坑道,这对他们来说应该很重要。”
"One of our biggest questions is why did they dig tunnels of this magnitude," she says. "it had to be for a very significant reason."
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