n. a passageway through or under something, usually underground (especially one for trains or cars)
v. force a way through
n. 隧道, 地下道
vi. 挖隧道
vt. 掘隧道于
1. The train goes through a long tunnel in the mountains.
火车在山里的一个长隧道里经过。
2. We found a tunnel that leads to the other side of the river.
我们找到了一条通向河对岸的隧道。
3. The children played in the tunnel made of cardboard boxes.
孩子们在用纸箱做成的隧道里玩。