Among these anthraquinones produced by Rheum palmatum L., emodin and rhein were considered more important.In the studies, rhein is taken as the reference standard.是什么意思_Among these anthraquinones produced by Rheum palmatum L., emodin and rhein were considered more important.In the studies, rhein is taken as the reference standard.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句