the frontiers of something idiom
C2 …的知识前沿；…的疆界
the limits of what is known or what has been done before in an area of knowledge or an activity
the frontiers of science and technology 科技前沿
江苏热线英汉汉英双解词典包含207361条英汉翻译词条，涵盖了常用英语单词及词组短语的翻译及用法，是英语学习的必备工具。