地面；底子；研磨，磨碎；磨目的的英文

ground

• 地面:    the earth's surfac ...
• 底子:    bottom; base
• 研磨:    grind; pestle abra ...
• 磨碎:    trituration; attri ...
• 磨:    mill; millstones
• 目的:    purpose; aim; goal ...