brad /ˈbræd/
  曲頭釘
  Brad n.  A thin nail, usually small, with a slight projection at the top on one side instead of a head; also, a small wire nail, with a flat circular head; sometimes, a small, tapering, square-bodied finishing nail, with a countersunk head.
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  brad
       n : a small nail
       v : fasten with brads