by length曲线: curve; curved line延伸: extend; stretch; elongate; r ...至: to; till; until特定: specially appointed; special ...长度: length; longitude; size; ext ...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:曲线延伸至特定长度，即可在微信中查询翻译
