They often have an imperfect grasp of nutritional science.
他们常常对于营养学不甚了解。
My scientific research and teaching career in nutritional science began over 50 years ago and mostly continued thereafter at Cornell University.
我在营养学上的科学研究和教育生涯始于50年前，后来多在康奈尔大学进行。
My scientific research and teaching career in nutritional science began over 50 years ago and mostly continued thereafter at Cornell University.
我在营养学上的科学研究和教育生涯始于50年前，后来多在康奈尔大学进行。
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