Think of the ionosphere and the ground as the terminals on the battery and you put a wire between those two terminals and current flows, and literally you get a spark.

把电离层和地面想象成电池的两极。 用一根导线连接这两极的话，电流就会流动，然后就会产生火花。

youdao

The Lot 9 order includes LVT(1) airborne and LVT(2) ground-based Low Volume Terminals under the Indefinite Delivery/Indefinite Quantity contract awarded in January 2000.

根据2000年2月授予的不定期交付/不确定数量合同，Lot 9订单包括LVT(1)机载和LVT(2)陆基低容量终端。

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At Tokyo Station, one of Japan's busiest subway terminals, shaken commuters grabbed one another to stay steady as the ground shook.

CNN: Widespread destruction from Japan earthquake, tsunamis

In 2007, China launched the first satellite of its second-generation system, called Beidou-2, which is thought to use cheaper terminals and, unlike its predecessor, doesn't require a ground station.

WSJ: Beijing Launches GPS Rival

To date, 64 European airports have signed up to the Airport Carbon Accreditation Scheme, a voluntary initiative launched in 2009 that aims to reduce emissions from ground transport, boost the use of renewable energy and increase the energy efficiency of airport terminals.

BBC: Airports doing more to go green