n.鋪砂；砂紙打磨
動詞sand的現(xiàn)在分詞.
This preparation consists of sanding away any paint or rust to obtain a smooth but not highly polished surface. 準備工作包括用砂紙打磨，除去油漆和銹跡，以使表面光滑但又不拋得很光。
