tunnel
n. /ˈtʌnl/ B2
隧道；地下通道
An artificial underground passage through a hill or under water.
仙境例句
The White Rabbit led Alice through a dark tunnel under the garden.
白兔领着爱丽丝，穿过花园下面一条黑漆漆的地道。
原著这一句
The rabbit-hole went straight on like a tunnel for some way, and then dipped suddenly down, so suddenly that Alice had not a moment to think about stopping herself before she found herself falling down a very deep well.
兔洞像隧道一样笔直向前延伸了一段，接着突然陡直向下，猛烈得让爱丽丝根本来不及想要停下来，就发现自己正朝一口极深的井里坠落下去。
卡罗尔原著 · 第 1 章