71.   But now that there are medicines to fight cancer, infections, mental illness and neurological disorders, the blood-brain barrier has turned into a mixed blessing.

72.   But in truth, the U.N. presence has been a mixed blessing, hemmed in by its mandate of scrupulous neutrality.

73.   But she admits that being the boss is somewhat of a mixed blessing for a young African-American woman in Hollywood.

74.   But so far, they have been a mixed blessing for the profession.

75.   But some critics of Con Ed and of nuclear power said Thursday that the sale could prove to be a mixed blessing.

76.   But Stewart Grabel, ombudsman for the Pima County Council, calls the HMOs a mixed blessing.

77.   But that can be a mixed blessing.

78.   But now it may be more of a mixed blessing.

79.   But the aid was a mixed blessing.

80.   But other environmentalists warn that the growing influence of humane treatment concerns is a mixed blessing.