lǎo / shī / ràng / wǒ / men / bǐ / jiào / sǎn / tǐ / hé / pián / tǐ / zài / biǎo / dá / shàng / de / bù / tóng老师让我们比较散体和骈体在表达上的不同。The teacher asked us to compare the differences in expression between free prose style and parallel prose.