11.   And hardly anyone today can afford not to understand the concept.

12.   Another thing Schottenheimer likes about Hasty is that he tries to understand concepts of defense rather than just his assignment.

13.   Architects understand the concept, but often their clients do not.

14.   As long as children can understand the concepts of shooting, they may participate with their parents, according to Cotrell.

15.   As the husband of a real-estate developer, Mack Brown understands this concept.

16.   Besides making lessons interactive, Hindy said she spends many hours tutoring students, during recess and after school, to ensure they understand math concepts.

17.   But he was not the only one to understand the concept.

18.   Calendars help the little ones understand the concept of time, and those aimed at older children provide interesting information on subjects ranging from the Civil War to baseball.

19.   Eric Sundin, president of Electric Vehicles Northwest in Seattle, said he has many customers who do not understand the concept of an electric bike.

20.   Even when people understand such concepts, they distrust the health care system to obey their wishes.