The train will pass through a tunnel. 火車(chē)將要穿過(guò)一個(gè)隧洞。
With the development of the tunnel and underground project construction technology, the waterproof requirement to structure is higher and higher. 摘要隨著(zhù)隧洞和地下工程施工技術(shù)的發(fā)展，對結構防水的要求越來(lái)越高。
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