Over the past dozen years, world farm output has barely kept pace with increased demand.

在过去的十几年，世界农业产量几乎没有跟上需求增长的步伐。

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"For each bacteria or virus that has been sequenced anywhere in the world, we have several dozen squares on the checkerboard that will identify sequences from that organism," Slezak explained.

“对于世界上每种已被测序的细菌或病毒，载玻片棋盘格子中的一些方格都将会识别该生物体的DNA序列，”Slezak解释道。

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According to a comprehensive study published in the journal Clinical Infectious Diseases, swine flu had infected only several dozen people in the world since it was first identified in 1930.

从发表在《临床传染病》上的综合研究来看，自1930年确认第一例猪流感传染人类的病例以来，世界上被感染的人只有数十位。

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Around the world a dozen Macanese associations hold regular events to promote their cultural legacy.

CNN: ASIANOW - TIME Asia

That opened the door to a half-dozen world-class contenders, including most unexpectedly Woods, who eagled the eighth to briefly move into a tie for the lead.

WSJ: From Woods to McIlroy to Donald, Why 2011 Was a Very Good Year in Golf | Golf Journal by John Paul Newport

Team Lewis regrouped, firing Correa and bringing in Emmanuel Steward, trainer of more than a dozen world champions at the famous Kronk gymnasium in Detroit, Michigan, and ironically the man that had masterminded McCall's win over Lewis.

BBC: Lewis: From playground jibes to world champion