China's Olympic road after a difficult and tortuous process.

中国的奥林匹克之路经过了艰难曲折的历程。

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Improving regulation is a tortuous process, as new chemical rules show.

新的化学物品条例表明，完善管控过程曲折复杂。

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The cognition of "Propriety" and "Ceremony and Propriety" has experienced a tortuous process in our country.

我国对“礼”和“礼仪”的认识经历了曲折的过程。

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They have started to do so, but it is a tortuous process.

ECONOMIST: Cuba��s economy

Our correspondent says the election had been a tortuous process, and that Mr Pena Nieto is unlikely to see a quiet acceptance of the result.

BBC: Protesters outside electoral commission - 6 July

It is a tortuous process, and although the MEPs have significant input into the final legislation, it is the Council of Ministers, which is not directly elected, who have the real power.

BBC: My week as an MEP - Tuesday