parallel program的用法和样例：
例句
- Development of parallel programs is concerned as an acknowledged difficulty in computing.
并行程序的开发是并行计算中一个公认的难题。 - Some existing examples have been tested with the developed technique and the results prove that the algorithm has high speedup and parallel efficiency.
算例验证的结果表明，并行程序具有明显的加速比和并行效率。
