Scaling up renewable energy to meet a major proportion of power demand by 2030.

扩大可再生能源规模，到2030年满足一大部分电力需求。

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Vietnam's agricultural sector employs more than two-thirds of the country's population and accounts for a major proportion of exports.

超过三分之二的越南人口都从事农业生产，而且农业产品是越南的主要出口商品。

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Aneuploidy is an important point at issue in human reproductive biology, accounting for both a major proportion of miscarriages and various congenital malformation syndromes among newborns.

非整倍体是人类生殖生物学中的重要问题，是引起自发性流产和新生儿中多种先天性畸形综合征的主要原因。

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The committee also criticised the ticketing system used for the London Olympics, which saw the public unable to buy a large proportion of tickets for major events.

BBC: MPs warn on London 2012 volunteering legacy

This was the highest proportion of NO votes received at any major U.K. bank so far in 2011.

FORBES: On Both Sides of the Atlantic: CEO Pay Increases > Total Shareholder Returns

But more importantly, the census reveals that Boston now has the highest proportion of 20- to 34-year-olds in all major U.S. cities.

FORBES: Sports Is Helping To Spur Growth In Boston