Step by Step 3000 第2册 Unit11:Space(4)

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　　Listen to the following statements you have learned in the previous and present units.

　　Pay special attention to the parts in bold part. Learn to appreciate and use the language.

　　1. to reduce the spread of virus/ a disease.

　　Health experts say washing you hands reduces the spread of virus and other organisms that cause disease.

　　Experts say hand washing is the simplest and most effective way to reduce the spread of infectious diseases.

　　2. to be blamed on.

　　In addition, millions of food poisoning cases each year are blamed on people who prepare food who do not wash their hands.

　　The spread of infections often is blamed on health workers who do not wash their hands after treating patients.

　　3. a reminder² of...

　　So I think this should be a reminder of how large the role of prevention can be for reducing cancer deaths.

　　4. to act as a clearing house for...

　　Doctor Rifkin told ABC news that America's Doctor Online acts as a clearing house for the hundreds of thousands of responses, a web browser³ might turn up in answer to a question.

　　5. To be bathed in...

　　The observatory⁴ changed the astronomers⁵' views of the heavens, after showing that the entire universe is bathed in the invisible gamma rays, but highest energy form of light.

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