1806Ann. Rev. IV. 82 The country is not only bad but unbetterable.
1874Ruskin Fors Clav. xl. IV. 76 A lovely, classic, unbetterable sentence of Marmontel's, perfect in wisdom and modesty.
英语词典包含277258条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。