n.隧道；地道；洞穴
v.挖地道；挖隧道
The heavy traffic crawled through the narrow tunnel. 拥挤的车辆慢吞吞地穿过狭窄的隧道。
The kid dug a tunnel in the sand. 小孩在沙堆里挖了一个地道。
Moles make underground tunnels. 鼹鼠常打地洞。
用作动词 (v.)The engineers had to tunnel through solid rock. 工程师须要在坚实的岩石中开凿隧道。
Sometimes the snow was so deep we could tunnel through it. 偶尔雪会积到可以造隧道那般的深度。
