cornerstone
英 ['kɔːnəstəʊn]
美['kɔrnɚston]
- n. 基础；柱石；地基
考试真题
- sustainable way is the cornerstone (基石) of our nation's energy security, and will be one of the major challengesof the 21st century.
出自-2011年12月阅读原文
- The college students had cultivated the ability to ask questions, the cornerstone of critical thinking.
出自-2015年12月阅读原文
