To dig a hole or tunnel for habitation or refuge.

为居住或躲藏而挖洞或地道。

youdao

The end, as of a mine or tunnel, at which work is advancing.

采掘面末端，如矿井的或坑道的，在此工作仍在继续。

youdao

The results may be applied to analyze the stability of borehole or tunnel.

其结果可以应用到分析井孔和巷道的稳定性。

youdao

After six Eurostar trains broke down in or near the tunnel that runs under the English Channel, the system has been suspended while engineers troubleshoot the electrical problems thought to have been brought on by condensation.

VOA: standard.2009.12.21

When the body is in stress, we have various unusual stimulations of the visual sections of the brain, and perhaps that explains the white light or the feeling of compression in the tunnel.

身体受压时,我们收到对大脑视觉区域,各种不同寻常的的刺激,也许这可以解释白光,或者在隧道里压抑的感觉

耶鲁公开课 - 死亡课程节选

Electrons, like that imaginary tennis ball, can simply jump (or tunnel) from one place to another, and molecules can attract each other at moderate distances.

ECONOMIST: Small wonders

This can ensure you are building a correct standing workplace and not doing anything to harm yourself or create long-term arm, shoulder, or other joint problems (or carpal tunnel syndrome).

FORBES: Connect

Without an internal combustion engine or transmission tunnel, the interior of Model S has more cargo space than any other sedan in its class and includes a second trunk under the hood.

ENGADGET: Tesla boosts Model S base price by $2,500 for new 2013 orders