The formation of the channel is initiated when electrons surge from the cloud base toward the ground.

当电子从云层底部涌向地面时，通道就开始形成了。

youdao

The increase of rainwater runoff, runoff coefficient increases, the formation of the ground.

汇流的雨水增加，径流系数增大，形成了地面的雨水径流。

youdao

Based on indoor physical simulation and analyses of fractal geometrical characters, the mechanism of formation and the rule of basic development of the Yuci ground fissures are expatiated.

本文在采用室内相似材料物理仿真模拟试验和非线性分形几何特征分析基础上，论述了榆次地裂缝的形成机理和基本发育特征与规律。

youdao

The logo formation will hover about 36m (118ft) above the ground at the lowest point and the highest point (the tip of the logo) will be at approximately 130m (426ft) above ground.

ENGADGET: Quadrocopter fleet stuns Londoners with giant hovering Star Trek logo (video)

Liverpool have played at Anfield since their formation in 1892, when arch-rivals Everton left the ground to play at nearby Goodison Park.

BBC: Anfield stadium

Well the results of the first half of 2012 are now available from Rosstat and, at first glance, they would appear to be ground for significant optimism: GDP grew at a 4.9% rate, fixed capital formation grew at 4.7%, and retail turnover galloped ahead at a rapid 6.9% annual rate.

FORBES: Russia's Economy in 2012: A Strong Start and an Uncertain Future