遗产代码维护人员的短缺，以及现代计算环境的变迁都给遗产软件系统的维护带来困难。
The shortage of qualified technical staffs and the changing to modern computing environment brings difficulty to software maintenance.
浮雕是一座城市的历史，一座城市价值理念的存在和变迁都能在不同时期城市浮雕作品上淋漓精致地展现。
The reliefs and sculptures of a city carry its history and the value existence as long as the change could be fully represented by them.
此外，人生活丰富性的拓展、人主体能动性的提升、人类由必然王国向自由王国的跃迁都是通过社会生产实践来实现的。
Besides, social produce practice rich people life step up hominine subjective activity, and further human transition from realm of necessity to realm of freedom.
应用推荐