dǎo / yóu / huán / shì / yī / quān / kāi / shǐ / xiàng / yóu / kè / jiè / shào / zhè / zuò / gǔ / chéng / de / lì / shǐ

导游环视一圈，开始向游客介绍这座古城的历史。

The guide looked around and began introducing the history of the ancient city to the tourists.