以下为句子列表：
英文: An upper arm artery's ability to relax and expand to accommodate increased blood flow -- known as flow mediated dilation （FMD） -- was measured using high-frequency ultrasound before and after daily cocoa or placebo consumption.
中文: 在每日摄食可可或安慰剂前后，（研究人员）利用高频超音波，对肱动脉因应增加之血流的舒张能力；亦即流量介导扩张（FMD）进行测量。
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英文: At end-point, the venlafaxine XR group had a significantly greater decrease in the number of days with headache compared with placebo (P = 0.05).
中文: 治疗结束时，与安慰剂比较，文拉法辛缓释剂明显减少了头痛天数。
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英文: Conclusions—Bone marrow stem cell mobilization with subcutaneous G-CSF is safe but did not lead to further improvement in ventricular function after acute myocardial infarction compared with the recovery observed in the placebo group. (Circulation. 2006;1
中文: 结论：与对照组相比，皮下注射G-CSF驱动骨髓干细胞具有安全性，但并不改善急性心肌梗死后患者的心室功能。
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英文: During the six-week trial, 45 people were given 227 grams of cocoa without sugar, cocoa with sugar or a placebo each day.
中文: 在这项为期6周的试验期间，45名受试者每天分别获得227克的无糖可可、含糖可可或安慰剂。
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英文: For example, people take placebo pills, feel better, and conclude that the pills have cured their ailments.
中文: 举例来说，人们吃了安慰药丸,感觉好很多,而且得出结论药丸已经治愈了他们的病。
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