常見例句雙語例句It is difficult for mined tunnel with shallow cover to cross water-rich sand stratum.穿越富水砂層一直是淺埋暗挖隧道的難點。Combined with the treatment example of some expressway tunnel crossing mined-out region, the paper analyzed and evaluated its treatment effects.以某高速公路隧道穿越煤礦采空區(qū)的處治為實例，對該工程的處治效果予以分析并評價。 返回 mine tunnel