clear-ance

英[k'liər'æns] 美[k'liər'æns]
  • 间隙
  • clear adj.清楚的;明确的;明白(某事)的;清晰的;清澈的;晴朗的;头脑清醒的v.清空;清除;澄清;放晴;使明确adv.清楚地;彻底地n.空地
  • headed adj.有头的;有标题的动词head的过去式和过去分词.
名词 clearance:
  1. the distance by which one thing clears another; the space between them

  2. vertical space available to allow easy passage under something

  3. permission to proceed