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月听力原文
柯林斯高阶英汉双解学习词典释义
VERB
提炼;精炼
When a substance is refined, it is made pure by having all other substances removed from it.
例句
Oil is refined to remove naturally occurring impurities.油经过提炼去除天然存在的杂质。
VERB
改进,改善,改良(过程、理论或机器)
If something such as a process, theory, or machine is refined, it is improved by having small changes made to it.
例句
Surgical techniques are constantly being refined.外科手术的技术不断得到完善。
英英词典释义
Noun
1. the process of removing impurities (as from oil or metals or sugar etc.)