极坐标系 Traditional 極座標系 jí zuò biāo xì 🔊 polar coordinate system + Keep this word Meanings jí zuò biāo xì 極座標系 (math.) polar coordinate system Its characters 极jíextremelyHSK 3坐zuòto sit; to take (a bus, a plane)HSK 1标biāomarkHSK 7–9系xìto connectHSK 5