中文词 · Chinese word
瓶颈
píng jǐng — neck of a bottle; (fig.) bottleneck; problem that impedes progress
HSK 3.0 L7, HSK newest L7 · study the lists
中文词 · Chinese word
píng jǐng — neck of a bottle; (fig.) bottleneck; problem that impedes progress
HSK 3.0 L7, HSK newest L7 · study the lists