Researchers conducted double-blindstudies with children and determined that genetics have a much greater influence on hyperactive dispositions than a sweet-tooth diet.
研究人员进行了双盲的比对实验，结果表明基因对多动的影响比吃糖大多了。
2
But it turns out there are some small but well-conducted double-blindstudies demonstrating significant reductions in migraines in people taking one of these supplements.
但结果是有虽然小但是反映良好的双盲测试证明吃任意一种营养品的人，偏头痛症状确实有明显减轻。
3
The approval was based on data from 2 prospective, randomized, double-blind placebo-controlled clinical studies.