Such a programme can, however, disturb the balance of the infection without eliminating it, often causing unforeseen problems.

Black finally disturbs the balance, committing a definitive error.

This gives a clumsy appearance to the door, and disturbs the balance of an otherwise fine example of a door and doorcase.

But, again, you have to do that with football and you don't want to disturb the balances that are there in terms of the success of the sport.

Over time, the elements have disturbed this balance to a degree that the boulder can no longer be moved.