emery /ˈɛmərɪ, ˈɛmrɪ/

• 1. 

  N-UNCOUNT Emery is a hard, rough mineral that is put on paper or cloth and used for cleaning or polishing things. 金刚砂 [usu N n]

  例：

  File across the tips of each nail with an emery board to smooth the edges.

  用指甲砂锉把每个指甲的边缘锉平。