However, exactly why the surgery had a beneficial effect remains a mystery - analysis could find no direct link with losing weight, or reducing food intake.
然而，到底这种手术为什么会有好的作用仍是个谜——分析数据还是找不到这和减肥或减少食物摄入量之间的直接关系。
However, evidence from animal studies has suggested a direct effect from fish oil intake on the hearts electrical circuitry.
然而，动物实验的证据也提示，鱼油的摄入对心脏的电路有直接影响。
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