The trouble with nationalism, though, is that it's difficult to control.
国家民族主义的麻烦在于它很难控制。
Therefore, whenever we are faced with trouble, we should do our best to control ourselves.
因此，无论何时当我们面对困难时，我们应该尽力控制自己。
If they do not learn to control their emotions, they could cause themselves much trouble.
如果他们没有学会控制自己的情绪，他们可能会导致自己的很多麻烦。
This results in some trouble to design the automatic control system.
其控制模型的建立是比较困难的。
This results in some trouble to design the automatic control system.
其控制模型的建立是比较困难的。
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