Regulation of bend convex bank channel at river estuary was of great technical difficulties under the prerequisite of not changing the river regime.

河口区弯道凸岸段水深治理 ，在不改变大河势前提下 ，其技术难度较大。

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China "s Jade Rabbit moon rover landed on the moon in late 2013 to great national fanfare, but soon suffered severe technical difficulties."

中国玉兔月球车2013年底登陆月球，当时全国轰动，后来出现严重的技术困难。

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Therefore, it is of great important to solve the existing major safe technical difficulties in the process of exploration and development of high pressure and high gas rate Wells.

因此，有效解决高压、高产气井勘探开发过程中的井控理论和井控技术难题已显得十分重要。

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The Commission, set up by the Treasury, recognises there would be great technical difficulties for big banks, such as Royal Bank of Scotland and Barclays, in insulating their retail activities, that concentrate on providing services to households and smaller businesses, from investment banking.

BBC: Separation of retail banks 'will take years'