So the researchers designed a two-pan nanocell. The cell is measured m nanometers, or one thousand millionth of a meter. The particle used was two hundred nanometers-much, much smaller than a human hair.

　　The scientists say it was small enough to pass through the blood vessels of the cancer, but it was too big to enter normal blood vessels. The surface of the nanocells also helped them to avoid natural defenses.

　　The scientists designed the cell as a balloon inside a balloon. They loaded the outer part with a drug that caused the blood vessels to fall in on themselves. That cut off the blood supply and trapped the nanocell inside the cancer. Then, the nanocell slowly released chemotherapy drugs to kill the cancer cells.

　　The team says the treatment shrank the cancer and avoided healthy cells better than other treatments.

　　Section C

　　文章精要

　　科学家发明了一种治疗癌症的新型药物，这种药物可以进入癌细胞并杀死癌细胞，同时对正常细胞没有损害。

　　36.1aboratory

　　37.invade

　　38.poison

　　39.results

　　40.magazine

　　4 1.solve

　　42.prevent

　　43.measured

　　44.The particle used was two hundred nanometers-much，much smaller than a human hair.

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