求翻译：实验的检测结果表明通过物质交换系统可以很好地维持培养环路中培养液生化指标在设定的范围内。根据溶氧、pH传感器信号，按照反应器设计中提到的控制原则，智能化控制器通过改变通入物质交换器的气体成分，及时将培养环路中的pH和氧气含量调整到设定的范围。是什么意思？

Experimental results show that through the material exchange system could very well maintain training culture and biochemical index in the loop within a set range. Sensor signal based on dissolved oxygen, pH, according to the design of reactor control referred to in principle, intelligent controller by changing into the gas composition of matter exchanger, timely training content adjusted to pH and oxygen in the loop setting range.