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 snap gauge普通外径规plain indication显而易见的迹象plain ring ga ge普通环规Plain Chachalacan.小灰头稚冠雉(宝冠鸟科)plain butt joint无筋平接缝,平边对接plain valve head平阀头,平阀体plain rib stitch平罗纹组织Plain white rice白饭plain hole stone平孔宝石plain rice spoon素色饭匙