Wider spans are more economical and better for the navigation of shipping than shorter ones between piers with deep foundations penetrating the bed of the waterway.

与在河道下深打桥墩基础的短跨距相比，长跨距对航运更好更经济。

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The new library's deep foundations have erased all traces of the past for eternity.

ECONOMIST: Runes among the ruins

Thus a bridge to the second language is built on deep structural foundations.

ECONOMIST: A gift of tongues

Dorset County Council said engineers had dug five boreholes up to 25m (82ft) deep in the hill, investigated the foundations of the tunnel entrance walls and extracted samples for further investigation.

BBC: Mock-up of extended hood at Beaminster Tunnel