Near the tunnel of time and space, my dad dropped me the swimming ring.

快到时空隧道出口时，爸爸向我丢来了游泳圈。

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As a traditional method of shield tunnel segment designing, the free displacement ring method is safe but conservative.

自由变形圆环法作为盾构隧道管片衬砌设计的传统方法，其计算结果虽安全但偏于保守。

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As a sophisticated tunnel lining type, the universal wedge-shaped segments can do a good job in the control of the axis of the shield-driven tunnel and the quality of the segment ring.

通用楔形管片作为一种较先进的隧道衬砌形式，在盾构法施工中能够较好地控制隧道掘进轴线和管片成环质量。

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The crucial point, and the reason for the excitement, is that both ATLAS and CMS (which are located in different parts of the ring-shaped accelerator tunnel of the LHC) have come up with the same results.

ECONOMIST: The Higgs boson

But the shut-down schedule also includes upgrades to all four of the LHC's detectors, the shielding of electronics, and even an overhaul of the ventilation system of the tunnel that houses the main accelerator ring.

BBC: LHC switches off for two-year break