Those on the placebo had almost no change, said Julie L. Ryan of the University of Rochester, the lead author of the study.

服用安慰剂的则基本上没什么变化，罗切斯特大学的朱莉·L.·瑞安说。 她是该项研究的主要负责人。

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Under salt stress, in the absence of CO_2 enrichment the content of MDA was increased, while in CO_2 enrichment the content of MDA had almost no change.

盐处理后，在正常大气条件下的情况下丙二醛（MDA）的含量提高了，而在有CO_2加富的情况下MDA的含量几乎没有发生变化。

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They found that people who had taken the metformin had a 19 percent reduction in their vitamin B12 levels compared with people who had taken a placebo, who had almost no B12 change.

他们发现服用二甲双胍的患者维生素b12含量要比服用安慰剂的患者低19%，而后者B12水平正常。

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