求翻译：从政府对四大要素的影响看，政府对需求的影响主要是政府采购，但是政府采购必须有严格的标准，扮演挑剔型的顾客（在美国，汽车安全法规就是从政府采购开始的）；采购程序要有利于竞争和创新。在形成产业集群方面，政府并不能无中生有，但是可以强化它。政府在产业发展中最重要的角色莫过于保证国内市场处于活泼的竞争状态，制定竞争规范，避免托拉斯状态。是什么意思？

From the four elements, the impact on demand is the government procurement, government procurement must have strict standards, play a discerning type of customer (in the United States, car safety regulations from the government procurement); procurement The program should be conducive to competition

From the 4 major elements of the impact of the Government, the impact on demand is mainly the Government Procurement, but the government procurement must be a strict standard, and playing the fastidious type Customer (in the United States, motor vehicle safety regulations from government procurement

Effects on four elements from the Government, major government procurement on demand by the Government, but must have strict standards on government procurement, play a critical customer (in the United States, started in auto safety regulations from government procurement), procurement procedures to