- He has done it by exploring, by experimenting, by developing his own model of the grammar of language, by trying it out and seeing whether it works, by gradually changing it and refining it until it does work.
出自-2010年6月聽力原文
- Groups like these will help you refine your analytical skills and enable you to express yourself better.
2019年12月四級真題（第二套）聽力 Section C
- The major components of our energy systems, such as fuel production, refining, electrical generation and distribution, are costly installation that have lengthy life spans.
出自-2015年12月閱讀原文
- Can they refine the idea and resubmit it?
出自-2011年6月閱讀原文
- Instead of trying to refine old formulas, they invent new ones.
2019年6月六級真題（第一套）聽力 Section B