tunnel - Definition & Meaning

a passage dug through or under a mountain or a structure, typically for cars, trains, people, etc.a passage dug through or under a mountain or a structure, typically for cars, trains, people, etc.

A tunnel is an underground passage that is typically built for transportation, such as roads, trains, or utilities. It can also be used for water flow or as a way to bypass natural obstacles like mountains or rivers. Tunnels are usually dug or drilled through the earth or rock, and they can vary in length, width, and purpose. They are often lined with concrete or steel to prevent collapse. Tunnels are an essential part of infrastructure, providing safe and efficient routes for people and goods. Some tunnels are open to the public, while others are used only for specific purposes, like mining or utilities.A tunnel is an underground passage that is typically built for transportation, such as roads, trains, or utilities. It can also be used for water flow or as a way to bypass natural obstacles like mountains or rivers. Tunnels are usually dug or drilled through the earth or rock, and they can vary in length, width, and purpose. They are often lined with concrete or steel to prevent collapse. Tunnels are an essential part of infrastructure, providing safe and efficient routes for people and goods. Some tunnels are open to the public, while others are used only for specific purposes, like mining or utilities.

例句

The train disappeared into the tunnel with a roar.
火车轰鸣着消失在隧道中。
We drove through a dark tunnel carved into the mountainside.
我们开车穿过了一条挖在山坡上的黑暗隧道。
Workers are repairing the tunnel to improve traffic flow.
工人们正在修理隧道以改善交通流量。