double length双倍: gemination; double长: older; elder; senior倍: times的: 4次方是 The fourth power of 2 i ...倍长，双倍长度: 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:双倍长倍的，即可在微信中查询翻译
