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The expression “almost meaningless' (l.23) implies that it is not easy to decide what the term 4G represents.
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In line 4, the term “clear–cut" gives the reader information about “answer".
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function in a more complex way than fiber optic cables.
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The word “average" (l.1) is used in the text as an expression related to time.
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The aim of the text is to present news about cables used for data traveling.
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The terms 3G and 4G are continuously employed to attract customers.
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The term “hard–to–reach" (l.33) is an adverb which means incomprehensible.
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The author believes 4G phones are faster than the 3G ones.
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HSPA+ 21/42, WiMAX, and LTE are considered by many as fast technologies.
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In line 18, “unreel" indicates a type of optical fiber.
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rely on differences of air density.
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The criteria established by International Telecommunications Union were accepted by the 4G companies.
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The technology of mobile networks was less complex in the first two generations.
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The new technology being developed at the University of Maryland may enable signals to be sent to longer distances than before.
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are being tested by NASA.
