alternative option比较: compare; compare with; contr ...选择: pick and choose; select方案: scheme; plan; programme; pro ...路由选择方案: routing scheme系统选择方案: systems alternatives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:比较选择方案，即可在微信中查询翻译
