11.   And it would be impossible to provide constant vigilance at future exhibitions.

12.   Constant vigilance to match appropriate services to needs, assessed along tight guidelines, is one way to avoid temptation.

13.   And constant vigilance really is required lest government bureaucracy grow too extensive.

14.   As their numbers dwindle, the survivors have much to teach about the nature of evil and the constant vigilance required to prevent its recurrence.

15.   But she was convinced that her constant vigilance was all that stood between me and social ruin.

16.   Clinton said disasters, including the recent California floods, underscore the need for constant vigilance.

17.   Constant vigilance, indeed, is the price of the life of the libertine.

18.   Diabetes is an unrelenting illness, requiring constant vigilance for the warning signs of dangerously low blood sugar, or hypoglycemia.

19.   Enforcing the rules can require constant vigilance.

20.   Even the most well-defended house, however, is not entirely safe from attack without constant vigilance.