21.   He said his son is at the age now where he understands the nature of pro baseball.

22.   He said that even centrists who say peace talks should wait until younger leaders succeed Arafat do not understand the nature of the conflict and the Palestinian movement.

23.   He understands the nature of the animal in New York.

24.   I tried to understand the nature of this illness, but then I gave up.

25.   I understand the nature of the bargain that I made.

26.   I understand the nature of the business.

27.   In the process, I tried to understand the nature of goodness.

28.   Large numbers of families do not appeal sanctions, in part because they do not understand the nature of their alleged violations or their right to appeal.

29.   Justice understands the nature of the business.

30.   Ordinarily, once epidemiologists understand the nature of a particular microbe and the way it is transmitted, they can develop effective public health responses.