求翻译：《实践论》是毛泽东同志对于实践的正确而系统的见解，对于指导当时的中国革命，指导我们现在、将来各种实践活动都有着极为深远的意义。是什么意思？

The practice is the practice of Comrade Mao Zedong correctly and the system views, for guiding the Chinese revolution of at that time, guide us now, various practical activities have a very far-reaching significance in the future.