1. 失色; 褪色; 面无血色：join the colours 参军, 入伍 | lose colour 失色; 褪色; 面无血色 | lower one's colours 投降, 屈服 降低要求; 退让
2. 变得苍白：140.draw to a close 快要结束,使结束 | 141.lose colour 变得苍白 | 142.on condition that 条件是
1. As Tang tomb murals were painted on mud walls, it is easy for them to lose colour and become broken.