The data being passed can be considered as "message packets" and the range or data types can be checked, for data generated from one unit, and tested for validity before being passed into another unit.
被传递的数据可以看作是“消息包”，可以检查一个单元所生成数据的数据范围或类型，并在传递给下一个单元之前测试其有效性。