a1864Rush (Webster), Each syllable is a prolongable quantity.
1889Philos. Mag. Ser. v. XXVII. 14 Had the rod been really indefinitely prolongable.
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。