31.   You also learn in combat that your flight is only as strong as its weakest link.

32.   American military planners should look to the lessons that were learned in Vietnam.

33.   Students learned the practical application of the theory they had learned in the classroom.

34.   Children learn in mixed-ability classes and move up a class each year.

35.   He was also learned in classical music with a great love of opera.

36.   ...an American trying to dredge up some French or German learned in high school.

37.   This re-creation of a town in the Old West really vivifies the history that visitors learned in school.

38.   What he had learned in one context transferred to a completely different one.

39.   Scientists have studied the lung in space and learned much they could not have learned in laboratories on Earth.