Interpersonal communication is primarily influenced by non-verbal interaction and only secondarily by content and words.
This mechanism probably evolved secondarily.
Ground water contamination is caused secondarily by soil contamination.
英语词典包含67175条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。