经济学
成本与时间之比的规则
Covert operations breed a disrespect for the truth and the rule of law.
CENTERFORSECURITYPOLICY: The Case Against the Halperin Nomination -- First Edition
英汉双解词典包含3185865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。