zhè / zhī / duì / wǔ / cháng / qī / wèi / hù / biān / jiāng / shǒu / hù / zhe / biān / jìng / jū / mín / de / ān / quán

这支队伍长期卫护边疆，守护着边境居民的安全。

This unit has long guarded the frontier and protected the safety of border residents.