lǎo shī / yì biān / jiǎng jiě / gōu liǎn / de / bù zhòu / yì biān / shì fàn / rú hé / yòng / yóu cǎi / gōu chū / duì chèn / de / wén yàng

老师一边讲解勾脸的步骤，一边示范如何用油彩勾出对称的纹样。

The teacher explained the steps for painting opera facial makeup while demonstrating how to create symmetrical patterns with greasepaint.