While present parallel programs mostly machine dependent, so the transportability of parallel programs are very poor and it is very difficult to predict the program performance.

而现有的并行程序绝大多数是依赖机器的，因此并行程序的可移植性差且难于预测性能。

youdao

While present parallel programs mostly machine dependent, so the transportability of parallel programs are very poor and it is very difficult to predict the program performance.

而现有的并行程序绝大多数是依赖机器的，因此并行程序的可移植性差且难于预测性能。

youdao