When we say that some event allows an effect, we mean that there is already some tendency for that effect to occur, and event fails to block the effect from happening.

当我们说，某些事件“允许”某些效果发生，我们的意思是说，现在已经有了某些效果发生的倾向，而某些事件未能成功地阻止该效果的发生。

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The hope is that gene screening could ID women whose fetuses would be at-risk, and that dietary supplements or drugs could block alcohol’s effect.

通过基因筛查技术可以筛选出那些女性的胎儿存在此种风险，并通过饮食补充或药物治疗来阻止酒精的影响。

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The detail analysis of lapped orthogonal transform, which can reduce block effect, is presented. Theory analysis of lapped orthogonal transform is given, and the experiment is done.

对去除块效应的交叠正交变换进行深入研究，给出交叠正交变换的理论分析，并进行实验仿真。

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So far, it is unclear whether they will fully back DaimlerChrysler: although they have in effect washed their hands of Mitsubishi, they might still block reforms such as aggressive job-cutting if they felt these might tarnish the group brand.

ECONOMIST: Daimler and Mitsubishi Motor

Among economic historians there is a growing consensus that guilds in Europe lost their ability to block new technology once society realised that innovation had a beneficial effect on humanity, and was thus not a zero-sum game.

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