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。

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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。

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The seepage erosion and disintegration produced by the activity of ground water will result in formation of soil cave.

岩溶区地下水或地表水的活动，将对土层产生潜蚀作用及崩解作用，进而形成土洞。

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The game was birthed in the country in 1930 with the formation of the Lagos Polo Club, which, set on an old British Army Parade ground, served as an entertainment hotspot for colonial officials who had previously played the sport in England.

FORBES: Nigerian Millionaires Embrace Polo