1. The flue has become sooted up.
烟道里都是黑灰。
2. But the wall paintings and the painted sculptures have gone through thousands of years; they are frail, delaminating, disrupting, flaking, powdered, color changed, molding and being sooted. If let it be, the Dunhuang art will not exist. To protect Dunhuang from decaying and make her live a longer life so that she can be passed on to the later generations as real and intact as possible is a hard and urgent job.
但是敦煌文化遗产面临着病虫害、起碱、老化、自然腐蚀等等诸多的问题需要解决，保护和开放的矛盾也日渐激烈，敦煌艺术的保护与传承、研究与弘扬成为当今的首要问题。