然而，新的研究结果使人对这两种解释产生怀疑。
他的证词糊里糊涂，使人对他作为见证人的可靠性产生了怀疑。
His muddled evidence casts doubt on his reliability as a witness.
犹他州立大学的Eric Reither抱怨：“肥胖症患者的过度年轻化使人对这类医学技术的限度产生怀疑。”
"Obesity is being acquired at such young ages that you wonder what the limits of these technologies will be, " argues Eric Reither of Utah State University.
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