领域实体 Domain Entity
或叫实例域、实例字段 instance field
中国城市与区域实验室 CCRL
各领域务实合作 practical cooperation in various fields
领域实体数据库 Domain Entity Databases
实闭域 [数] real closed field
实施区域协调发展战略 coordinated development at subnational levels
时域实验设计 time domain experiment design
频域实验设计 frequency domain experiment design
实域 [数] real domain ; [数] real field
实域中两个真理之间的最短路程是通过复域。
Jacques Hadamard the shortest path between two truths in the real domain passes through the complex domain.
证明了任一环有代数封闭的扩张环，且实封闭域上的四元数体是代数封闭的，给出了代数封闭环的若干性质。
The two theorems are proved that any ring can be extended into an algebraically closed ring and that the quaternionic skew field over a real closed field is algebraically closed.
在计算实践中，处理大型多项式时，由于复杂性原因，实闭域一阶理论判定方法实际上无效。
The conventional methods do not work in practice when dealing with large polynomials because of their high complexity.
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