Two papers published today in the American Journal of Clinical Nutrition outline the case for and against using the concept of ultra processed foods to help inform dietary guidelines beyond conventional food classification systems.

今天发表在《美国临床营养学杂志》上的两篇论文概述了支持和反对使用超加工食品概念来帮助为传统食品分类系统之外的膳食指南提供信息的理由。

The Rh blood group system is a classification system for blood that depends on the presence or absence of the Rh antigen - or factor - on your red blood cells.

Rh血型系统是一个血液分类系统，取决于红细胞上Rh抗原或因子存在与否。

The Aegyptiaca was a history of Egypt that included a chronological rundown of all the pharaohs up until that point which he grouped into 30 dynasties Modern historians realized they needed some classification system for all of these dusty mummified pharaohs.

《埃及记》是一部关于埃及的历史，其中包括了到那时为止所有法老的编年史，他将这些法老划分为30个朝代现代历史学家意识到，他们需要为所有这些尘土飞扬的木乃伊法老建立一个分类系统。