control requirement的用法和样例：
例句
- The actual control condition at the root of the notch is more problematic.
在缺口根部的实际控制条件是更难捉摸的。 - Researches on the methods and mechanism of phosphorus removal under anaerobic conditions are at the beginning, and the process control need to be investigated.
有关厌氧条件下除磷的方法和机理的研究刚刚开始，厌氧过程中磷去除的工艺控制条件还有待得到进一步研究。
