Peak oil critics have often questioned the IEA figures.

石油峰值论的批评人士常常质疑IEA公布的数据。

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Critics have often questioned both firms' technological prowess.

批评者常常质疑这两家企业的技术实力。

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The Sophists usually charged for instruction and often questioned things that people didn't really want questioned like, for example, the existence of popular deities.

诡辩家往往是明码标价的，而且总问些人们不太喜欢涉及的问题——例如，众神的存在与否。

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Bloomberg's news conference also coincided with a civil trial challenging the constitutionality of one of the city's strategies for taking guns off the street, a tactic known as "stop and frisk" in which officers have halted, questioned and often searched hundreds of thousands of mostly innocent people.

WSJ: Mayor: Fight crime by being more like NYC

For now pensions are on notice that consultants are often conflicted and should be questioned about these conflicts.

FORBES: Consequences of the Mutual Fund Industry's History of Transgressions (November 1, 2003 )

Some non-governmental organisations working in the field have accused him of often acting unilaterally and have questioned his commitment to longer-term projects.

BBC: Profile: Jimmy Carter