81.   As the sound waves of thunder pass through air of different temperatures, their speed changes, causing them to reach an observer at slightly different times.

82.   Ask if the fare will go down if you travel at a different time or date.

83.   At a different time, the outcome could have been tragic, Entner said.

84.   At different times he aligned himself with Beijing, white-ruled South Africa and Washington.

85.   At different times they may have embraced different constituencies and ideas.

86.   At different times, he was executive director of the National Association of Olmsted Parks, the Central Park Community Fund and the Horticultural Society of New York.

87.   At different times, Pitino has thought of dealing each of his point men.

88.   At different times rescuers detected tapping noises and followed the sounds toward trapped students.

89.   At different times the harbor would have received loads of silt from both rivers, as well as from the sea, which was close by.