例句與造句

1. Unsatisfied free radicals can spur the mutation of cells they encounter and are, thus, causes of cancer.
2. Dozens of companies have announced plans to flood the world with " hand-held devices " including various mutations of cell phones, MP3 music players, digital cameras, e-mail pagers, Web browsers and geopositioning systems.
3. It's difficult to find mutation of cells in a sentence. 用mutation of cells造句挺難的