Infrequency of use, however, is not always a fair measure of a words utility. In figure skating the triple Lutz is an extremely difficult maneuver, not often performed, but when a skater successfully accomplishes that jump it is the crowning moment of the program. The same can be said of adding challenging and unusual words to your verbal repertoire. You may not use them often, but when the need arises you know that you can call upon them with confidence to provide an appropriate and even spectacular effect.引自第217页
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