首次     shǒucì     the first time

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例子 examples:

1. 长三角城市居民半年人均收入首次突破万元大关
   Cháng sānjiǎo chéngshì jūmín bàn nián rénjūn shōurù shǒucì tūpò wàn yuán dàguān
   Residents in the triangle of cities on the Yangtze River half-yearly per capita average income breaks through the ten thousand yuan level for the first time
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   Source: 新华 Xinhua

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