61.   Before she could, Reno fell hard to the floor.

62.   Based on our informal survey, we found little reason to question the overall accuracy of EarCheck, though the smallest kids may be hard to test.

63.   Because certain models were reissued and made by two or three generations of glass blowers, they can be hard to date.

64.   Big wins in Iowa and New Hampshire would give him an aura of invincibility that would be hard to crack.

65.   Blumstein and other experts pointed to several factors they believe underlie the decline in violent crime, though these causes are hard to measure separately.

66.   A cloud of spores is colorless and odorless, and hard to detect.

67.   A different attitude is making it hard to judge whether the market is fairly valued using traditional measures, Geist said.

68.   A fish-eye glass lens magnifies the display even further, making the watch hard to overlook.

69.   A good screen name is hard to find, and getting harder.

70.   A new survey finds that users view online services as slow and hard to use.