tunnel=

1.地下通道；地道；隧道a passage built underground, for example to allow a road or railway/railroad to go through a hill, under a river, etc.

1.[i][t]开凿隧道；挖地道to dig a tunnel under or through the ground

1.隧道;地道;坑道;管道,烟道,风洞;【矿】石巷,平峒

1.在...凿隧道[掘坑道]

2.凿隧道通过

3.凿隧道[掘坑道]

4.运过坑道 (through) 进隧道 (into)

1.an underground passage through which vehicles travel; an underground passage made by animals

1.to dig a tunnel