Plain of厄斯垂伊伦plainadj.清楚的；简单的；坦白的；平常的；朴素的；纯的n.平原；广阔的区域adv.完全地；纯粹地plain coloured pile blanket素色绒毯plain-colour handkerchief素色手帕plain concrete construction素混凝土结构plain-coloured face cloth素色方巾Plain dealing is a jewel.诚实待人,贵于珠宝。plainclothes police officer便衣警官Plain Cipher Block Chaining普通密码阻滞链plain squirrel-cage motor正常结构的鼠笼式电动机plain water-filled roller平面充水镇压器plain spiral milling cutter普通螺旋铣刀