biān / fáng / bù / duì / cháng / nián / zhù / fáng / zài / hǎi / bá / sān / qiān / mǐ / de / gāo / yuán / shào / suǒ边防部队常年驻防在海拔三千米的高原哨所。Border defense troops are stationed at a plateau outpost 3,000 meters above sea level all year round.