tunnell的用法和樣例：
例句
- Red squirrels disappear inside trees, frogs go deep under the mud, and many other animals dig tunnels in the earth.
紅松鼠藏到樹(shù)里面去了，青蛙鉆入泥土的深處，而許多其它的動(dòng)物，則在地里挖坑道。 - A tunnel dug to intercept and destroy an enemy's mine.
對抗地道截斷或破壞敵人坑道而挖的地道 - The tunnel contract to a narrow passageway as you go deep.
再往里走，坑道縮小成了一條窄窄的通道。 - The roof of the tunnel was supported by wooden props.
坑道頂用木柱支撐。
