第一象限 dìyīxiàngxiàn first quadrant Definitions Defs Origin Strokes Stroke Words Sentences Sents 第一 dìyī numeral first occupying the lead position in a sequence, order, or ranking; the first象限 xiàngxiàn quadrant One of the four areas that a flat surface is divided into by the horizontal and vertical axes of a coordinate system.
