夜上受降城闻笛
回乐烽前沙似雪
受降城外月如霜
不知何处吹芦管
一夜征人尽望乡
Before the Beacon Tower, sand like snow lies white
Beyond the Surrender City, moonlight shines like frost
From somewhere unknown, a reed pipe sounds in the night
All night long, the soldiers gaze toward home, lost
逐句注释
回乐烽前沙似雪
“回乐烽”指回乐县附近的烽火台，点明边塞地点。以雪喻沙，写出边地荒寒、月色清冷，为全诗铺垫苍凉氛围。
The 'Huilu Beacon' names the frontier outpost. Sand is compared to snow, evoking the bitter cold and desolation of the border under moonlight.
受降城外月如霜
“受降城”为唐代受降城之一，此地曾受突厥降。月如霜，视觉上清冷皎洁，与上句“沙似雪”呼应，构成边塞月夜的寒寂意境。
The Surrender City refers to one of the Tang dynasty's submission-receiving forts. Moonlight is likened to frost, matching the snowy sand above to create a cold, silent frontier scene.
不知何处吹芦管
芦管（胡笳类乐器）声起，打破宁静。“不知何处”写出笛声飘忽不定，引人神往，也暗示思乡之情的普遍。
The reed pipe (a barbarian flute) breaks the silence. 'I know not where' conveys the ethereal, wandering sound that stirs longing in every listener.
一夜征人尽望乡
“尽”字点出所有征人皆被笛声触动乡愁。整夜望乡，画面定格在月光下的集体凝望，含蓄而深沉，道尽戍边之苦。
The word 'all' reveals that every soldier is moved by the flute to homesickness. They gaze homeward all night—a poignant tableau of collective longing under the moon, capturing the deep sorrow of frontier duty.
今日赏析
李益早年从军西北，深知边塞生活。此诗当作于其任幽州或灵武幕府期间，有感于边防将士的思乡情绪。受降城为唐王朝对北方民族受降之地，诗题点明地点，借夜笛之声写出征人共有的乡愁。
Li Yi spent his early career in the northwestern frontier and knew border life well. This poem was likely written during his service in the military headquarters at Youzhou or Lingwu, moved by the homesickness of garrison soldiers. The Surrender City was where the Tang court received submissions from northern peoples; the title sets the scene, and the night flute reveals the universal longing of the troops.
每日唐诗精选唐代经典作品，提供原文、英文翻译、逐句注释与赏析，适合古诗词学习、双语阅读和日常诗意积累。