Ukraine is racing to finish multiple lines of defence that could halt Russia’s swift advances, but efforts have so far been marred by delays and lack of co-ordination, according to Ukrainian officials and commanders.
烏克蘭官員和指揮官稱，烏克蘭正在爭分奪秒地完成多道防線，以阻止俄羅斯的快速推進，但迄今為止，這些努力因延誤和缺乏協調而打了折扣。
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