basic system extension

基本解释

Agricultural extension system at basic level in China had many problems in system, mechanism and other aspects.
我国基层农业推广体系在体制和机制等诸多方面存在不适应。
It points out the PLC design key is to satisfy the basic control function and the capacity, and maintenance convenience, the system extension and so on.
指出了PLC设计的关键主要是能满足基本控制功能和容量，并考虑维护的方便性、系统可扩展性等。
But with the deeper of market economy, there appear a lot of serious challenges in the basic agricultural extension system, which is the same with other regions in China.
但随着市场经济的不断深入，烟台市基层农业推广体系面临着日益严峻的挑战，而且这些问题与全国其他地区在农业推广中出现的问题有很大的相似性。