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B. 表重要性的结构
Are Americans a nation of frivolous divorcers who selfishly pursue the bluebird of happiness, oblivious to their children’s needs? Divorce opponents like Judith Wallerstein seem to think most parents see divorce as a marvelous opportunity for the whole family. How immature do they think people are ?All over America, unhappy spouses lie awake at night wondering if they and their kids can afford divorce financially, socially, emotionally. Where will they live, how will they pay the bills, will the kids fall apart, will there be a custody battle, what will their families say? The very fact that so many people leave their marriage for a future with so many pitfalls proves that divorce is anything but a whim. Most people I know who split up (not to mention my ex and me) spent years working up to it.
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The truth is that the economic boost from spinoffs, is untraceable. The Berlei bra, for instance, uses a Dupont material called CoolMax, which was derived from a fabric developed to improve thermal clothing by Outlast Technologies in collaboration with NASA’s Johnson Space Center. The proportion of Berlei bra sales accurately described as a NASA “spinoff” is anyone’s guess, but critics say returns can’t even come close to covering the cost of a shuttle flight.
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“The very fact that”这样的结构通常用来提示重要内容的出现。所以当类似的结构出现在段落首末位置的时候，该句极有可能是全段的主题句，也就是主题句。类似的结构还有”The point/problem/concern/idea/key factor is that…”, “what matters/accounts is…”, “what is extraordinary is…”等等。
C. 表示人物观点结论性的词:
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The Welsh forces in Dyfed-Powys and Gwent both had impressively shape spidergrams thanks to comparatively good records on reducing and investigating crime. The force with the most dimming graph was Avon and Somerset, which was once regarded as a metropolitan force but had been grouped under the new scheme with areas including Norhampton shire and West Mercia which have much lower crime levels. Avon and Somerset, which includes Bristol, pointed out that graph reflected the fact that the force and suffered form a wave of street crime that had subsequently been greatly reduced.
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类似的结构还有believe, suggest, conclude, hold, show, reveal, find, find out, discover等。
