101.   But gallium arsenide is much more expensive than silicon.

102.   But gas is more expensive than coal, and the plants are relatively small.

103.   But he and his colleagues also found that some managed care plans discouraged doctors from prescribing the newer antidepressants because they are more expensive than the older ones.

104.   But having a fixed mirror also made the instrument far less expensive than other large telescopes.

105.   But if I had the option I would not switch, because gas as a fuel is more expensive than oil.

106.   But it can also be more expensive than arranging tours yourself.

107.   But it has also meant that record numbers of Japanese are flying abroad on Japan Airlines because taking a vacation overseas has become less expensive than staying in Japan.

108.   But like most consumer electronics that come in condensed form, the watch-bound GPS device is more expensive than many similar handheld models.

109.   But new power plants can be much less expensive than many old ones.

110.   But one major drawback is that memory cards are far more expensive than microcassettes.