例句與造句

1. One study with no genetic component included in the complaint was conducted by Dr . David Christiani of the public health school.
2. Dr . David Christiani, director of occupational health at the Harvard School of Public Health, said the Rhode Island episode is causing " quite a bit of concern " among his colleagues around the nation.
3. While environmental factors such as second-hand smoke, asbestos and radon are believed to play a role in some lung cancers, many cases appear to reflect no obvious environmental factor, said Dr . David Christiani, a professor of medicine at the Harvard Medical School.
4. It's difficult to find david christiani in a sentence. 用david christiani造句挺難的