If disease then flares, it can be very difficult to get it back under control.
如果疾病此后发作，再把它控制可能能是非常困难的。
Rage can be directed, but it is very difficult to control.
狂怒可以被定向，但是非常难以控制。
Although the Control Panel is a good tool, it can sometimes be difficult to use.
虽然控制面板是一个很好的工具，它有时很难使用。
Control would be very difficult to enforce.
控制将是非常难以执行。
Control would be very difficult to enforce.
控制将是非常难以执行。
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