tunneling
透納
Tun·nel, v. t. [imp. & p. p. Tunneled or Tunnelled; p. pr. & vb. n. Tunneling or Tunnelling.]
1. To form into a tunnel, or funnel, or to form like a tunnel; as, to tunnel fibrous plants into nests.
2. To catch in a tunnel net.
3. To make an opening, or a passageway, through or under; as, to tunnel a mountain; to tunnel a river.
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