The twice-yearly trek has shaped nomadic life here for centuries.

几个世纪以来，这种每年两次的艰苦跋涉形成了这里的游牧生活。

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This global rebalancing was emphasised this week by the OECD in its twice-yearly Economic Outlook.

全球失衡，目前正在进行回调，这在经济合作与发展组织（OECD）于本周发布的半年一度的《经济展望》（Economic Outlook）中得以强调。

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The heads of each network present their findings at twice-yearly forums attended by MasterCard's top brass.

每个网络的负责人要在每年两次的论坛上展示他们的研究成果，而该论坛的与会者都是公司高层。

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You can visit the tea gardens or sign up for one of the twice-yearly Tea Tasting Masterclasses.

BBC: Twenty tastes of Britain

George Osborne is due to give his twice-yearly update on the UK economy at lunchtime.

BBC: UK service sector growth slows again in November

The ECB's policymakers were meeting in Vienna in one of their twice-yearly meetings away from Frankfurt.

BBC: France's prime minister wants a rate cut to weaken the euro