zhànshìmen / zài / jūnqí / xià / zhuāngyán / xuānshì / chéngnuò / zhōngyú / zìjǐ / de / shǐmìng战士们在军旗下庄严宣誓,承诺忠于自己的使命。The soldiers solemnly swore an oath under the army flag, pledging to remain loyal to their mission.