一种是利用差累积向量，另一种是利用持续行程编码。

One is based on the accumulative difference vector and the other is based on the use of run-length encoding.

youdao

当数据从一个设备传送到另一个设备时，用于补偿数据流速率差或事件发生时间差的一种例行程序或存储器。

A routine or storage used to compensate for a difference in rate of flow of data, or time of occurrence of events, when transferring data from one device to another.

youdao

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。

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.

youdao