Early in human culture, witchcraft was widespread use of it was in ignorance of the material world and spiritual world stage an effective form of knowledge and practical tools.
在人类早期的文化中，巫术被广泛地运用着，它是人们在蒙昧阶段对物质世界和精神世界的一种有效的认识形式和实用手段。
An effective method is proposed for obtaining the critical boundaries of hyper plan (HP) form of practical dynamic security regions (PDSR) of power systems in power injection space.
提出了一种在注入功率空间中求取电力系统实用动态安全域(PDSR)的超平面形式的临界稳定边界的新方法。
The practical result indicated that the additive produced form black liquor has longer effective time, good combustion effect and obvious economic benefit.
实际应用表明，水煤浆存放时间长，燃烧效果好，可添代现有水煤浆添加剂，经济效益明显。
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