Canada led the world in the development of radioactive isotopes for medical diagnosis and therapy, says Jacalyn Duffin, a medical historian at Queen's University in Ontario.

安大略省奎恩大学的医学史学家Jacalyn Duffin说，加拿大在医学诊断和治疗领域应用放射性同位素的进程是世界领先的。

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The councillor for the area Joyce Duffin said the problem was widespread.

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Jenny Duffin, one of the festival co-ordinators, said people would be given one of the single-shot cameras on which to capture a picture of a building.

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Ryan's mother, Carol Duffin, was so angered by the early start which she says has been creeping earlier in her district for years she launched "Save Tennessee Summers" seven years ago and lobbied state lawmakers unsuccessfully for legislation barring a pre-Labor Day first bell.

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