picket post造句怎麼寫

The facts that concept of Xun was developed with the development of the guard and defense system in the middle and late Ming Dynasty and picket posts were set up along the lines of communication in Yunnan laid the foundation of the defense system of Xun Tang troops in Yunnan in the Qing Dynasty.

Only a picket post half a mile out, on the railroad, and a single sentinel at this end of the bridge.