61.   To fix the mess, programmers must alter billions of lines of code or trick computers into understanding the difference in centuries.

62.   To understand the difference between the exploratory approach and a deliberate taboo-buster, it helps to hear from an authentic maker of deliberately offensive schlock.

63.   To understand the solution, it helps to understand the difference between circuit switching and packet switching.

64.   Tracing the morphology of angiosperms, which would help us understand the differences, and just where each species fits, is not easy.

65.   Understanding those differences can lead to new ways to treat disease using new drugs.

66.   Understanding these differences has spawned the field of pharmacogenetics, which explores how genetic variations influence the way people react to medicines.

67.   Unless you understand the difference, you can both physically and mentally hurt your pet through the misuse of aversive control.

68.   Unlike many novelists, Brown said, he understood the difference between a line that played on the page and a line that played on the screen.

69.   We have to understand the difference between a pain in the neck and a mortal threat.

70.   We all understand the difference.