Restriction conditions的用法和样例：
例句
- CSMA gets the optimal solution of the equation with some conditions and a fastalgorithm is proposed here.
本文提出的有限光谱混合分析方法是在约束条件下求混合光谱方程的最优解，并提出了快速算法。 - Class is a sort of virtual class that includes a set of all resources that meet the restriction.
类成为一种包含一个所有满足该约束条件资源集合的虚拟类。
