Metol-hydroquinone (denoting any of various developers based on a mixture of metol and hydroquinone).
Early 20th century; earliest use found in Walter Thomas Rogers (d. 1912).
英汉双解词典包含464360条英汉词条,基本涵盖了全部常用单词的翻译及用法,是英语学习的有利工具。