oriented manifold定向: directional; orient; orienta ...形: form; shape流形的定向: orientation of manifold不定向流: undirectional flow定向流矢量: directional flow component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:定向流形,即可在微信中查询翻译