中文词 · Chinese word
未知数
wèi zhī shù — unknown number; (fig.) an unknown; an uncertainty
HSK 3.0 L7, HSK newest L7 · study the lists
中文词 · Chinese word
wèi zhī shù — unknown number; (fig.) an unknown; an uncertainty
HSK 3.0 L7, HSK newest L7 · study the lists