in AM, use 美国英语用 tunneling, tunneled
										- N-COUNT 隧道;地道
A tunnel is a long passage which has been made under the ground, usually through a hill or under the sea.
											- ...two new railway tunnels through the Alps.
穿过阿尔卑斯山的两条新的铁路隧道 - …the motorway tunnels under the Hudson river.
哈得孙河下的高速公路隧道 
										 
										- VERB 挖隧道;挖地道
To tunnel somewhere means to make a tunnel there.
											- The rebels tunnelled out of a maximum security jail...
叛乱者挖地道逃离了戒备最为森严的监狱。 - The caterpillars tunnel into the fruit to grow and mature.
毛虫钻入果实,并在其中生长为成虫。 
										 
										- See also:  wind tunnel