1891in Cent. Dict.
1910Edin. Rev. Oct. 276 Variolisation..is said to have been known to the Chinese from the commencement of the eleventh century.
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。