reverse boundary反向: opposite direction; reverse; ...边界: boundary; frontier; border; ...方向: direction; orientation边界方向反向: reverse boundary沿着边界方向: follow boundary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:反向边界方向，即可在微信中查询翻译
