Once there, he would cling to the handrail until he reached the lower steps that the warmer tunnel air kept ice-free.

一到那儿，他便手抓扶手一直走到底下的台阶时才放开手，那里通道的空气暖和些，地面上结冰。

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Rail services through the tunnel also remain affected by snow and ice.

BBC: M20 in Kent still disrupted by cross-channel backlog

Here, sub-zero temperatures are created and tests carried out in a specially designed "icing-tunnel" with the aim of understanding ice and its aerodynamic qualities.

CNN: SHARE THIS

Later today we will travel to the Permafrost Tunnel, a unique research facility that allows scientists to study the composition and behavior of ice structures and frozen bioorganics dating over 40, 000 years old!

WHITEHOUSE: Council on Environmental Quality Blog