lǎo / shī / xiàng / wǒ / men / jiè / shào / le / yáng / qín / de / gòu / zào / hé / yǎn / zòu / fāng / fǎ

老师向我们介绍了扬琴的构造和演奏方法。

The teacher introduced us to the structure and playing technique of the yangqin.