Lǎo / shī / ràng / wǒ / men / zài / liàn / xí / běn / shàng / xiě / chū / yù / pǔ / Xī / lóng / de / dà / xiě / hé / xiǎo / xiě / xíng / shì

老师让我们在练习本上写出玉普西隆的大写和小写形式。

The teacher asked us to write the uppercase and lowercase forms of upsilon in our notebooks.