The distribution characteristics and laws of underground current for a change current system with the opposite direction are indicated in this paper.

本文阐明了反向变分流系统地下电流的分布特点和规律。

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Current estimates suggest that half of all the living matter on Earth lives underground, at depths of up to 5km.

现在估计地球上大约一半的生物生活在地下深度约5千米以下的地方。

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The fear is that, at current consumption rates, that underground bunker will be empty within 20 years, leaving the earth almost helium-free by the end of the 21st century.

我们担心的是，按照现在的消耗速度，那个地下储存库将在20年内枯竭，而在21世纪末留给地球的将几乎都是游离氦。

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The system consists of sensors fitted on cables throughout the network, both overhead and underground, measuring current and conductor temperature.

FORBES: GE Gobbles Up More of the Smart Grid

And investments, including the Underground's current star project, the Jubilee Line extension, have sometimes been guided more by political considerations than by careful cost-benefit analysis.

ECONOMIST: The end of the tunnel

West Cumbria has been ruled out of current plans for an underground nuclear waste storage facility, energy minister Baroness Verma has said.

BBC: Cumbria ruled out of current nuclear waste dump plans