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Other words such as comments, ______, attitudes, analysis can also be very useful.

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Apart from current news, radio reports on some ______ in science and technology also help ______ our knowledge about the world.

However, vocabulary has proved to be a problem that often ______ our understanding of the new information.

Therefore, in order to ______ our ability in listening, words that frequently appear in some popular science ______ should be carefully studied.

Besides, if we have a close examination of the ______ reports, we may find that they are often divided into different parts or paragraphs on the ______, the test or experiment procedures, the observations, the findings or results and so on.

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