There is no historical evidence that a nutritional guidance system based on 'negative' properties only is useful.
没有任何证据证明，一套仅仅基于“负面”成份的营养标签体系能起什么作用。
2
He added: "the use of a traffic light system to indicate the nutritional value of supermarket produce is now well-established."
他还说，一种预测超市产品营养价值的红绿灯系统现在已经建立起来。
3
For example, it is quite likely that information would be retrieved from an operational system to initialize the nutritional label for the research and development lead.