例句與造句

1. They don't have enough force to penetrate an egg, " said Dr . David Clapham of Harvard Medical School, who led the study.
2. MacKinnon's work should allow scientists to design new drugs for such diseases as epilepsy, high blood pressure and irregular heartbeat, said Dr . David Clapham, professor of neurobiology and cardiovascular research at Harvard Medical School.
3. Children's Hospital has already applied for a patent on the discovery and begun talks with a Boston company, Hydra Biosciences, to look for a compound that would block the protein and make the sperm too weak to reach or penetrate the egg, said Dr . David Clapham, the senior researcher on the project.
4. It's difficult to find david clapham in a sentence. 用david clapham造句挺難的