double length numberdouble-length numberdouble-length numeral双倍: gemination; double长: older; elder; senior数: frequently; repeatedly双倍长数字: double length numeral倍长数: double-length number; number, double-length下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:双倍长数，即可在微信中查询翻译
