arrow mark指向: directing; sensing; sense of ...标记: tab; sign; stamp; peg; label ...指向标: beacon; directing sign; localizator; localizer; marker指向标指向波: beacon超声指向标: supersonic dropping model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:指向标记，即可在微信中查询翻译
