talk in undertones 低声说话.
chestnut colour with an undertone of gold 略带一点金黄的粟色.
There was an undertone of happiness on her smiling face. 她的笑脸流露出幸福.
反义:
高考报名网英语在线翻译词典收录了155111条英语词汇在线翻译词条，基本涵盖了全部常用英语词汇的中英文双语翻译及用法，是英语学习的有利工具。