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Scientists say they have used the gene-editing tool CRISPR to repair a person's eyesight for the first time.

DNA is short for deoxyribonucleic acid. It is the substance that carries genetic information in the cells of living things. The CRISPR tool makes it possible to __________________________.

A patient recently had the procedure done for an inherited form of blindness, ______________________. The operation took place at Oregon Health and Science University in Portland. ______________________.

重点注释：

CRISPR：/'krɪspər/ 基因编辑技术

eyesight：['aɪsaɪt] n. 视觉，视力

deoxyribonucleic：[diˌɑksiˌraɪboʊnuˈkleɪɪk] n.脱氧核糖核酸;

Oregon Health and Science University：俄勒冈健康与科学大学(波特兰)

听力答案对照：

change DNA to add needed genes or take some away if they lead to problems.

the companies that make the treatment announced Wednesday

The companies did not release additional details about the patient

A piece of good news.

good news!!!!