plainlyadv.清晰地；明显地；直截了当地；朴素地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 chest film胸部平片plain slide rest普通刀架plain of erosion侵蚀平原plain bevel gear普通伞齿轮plain sheet iron无楞铁皮plain embroidery平绣plain dispersion单纯光散射plain as noondayadj.一清二楚(显而易见)Plain Hem Stitch颜基比plain bone chise平骨凿