yú jiā / kè shàng / lǎo shī / xiān / jiāo / wǒ men / tǔ nà / zài / kāi shǐ / tǐ shì / liàn xí瑜伽课上,老师先教我们吐纳,再开始体式练习。In yoga class, the teacher first taught us breathing exercises, then began the asana practice.