托福写作必备词汇：常用逻辑关系词
在托福的写作过程中，除了词汇和句型能力的不断累积之外。其实，对于托福写作对于每个学生的逻辑能力还是有着很高的要求。下面，我们就为大家介绍一下在托福写作中常用的逻辑词汇有下面几类，希望各位同学能熟练掌握.
托福写作必备词汇：常用逻辑关系词
1. 并列关系
and, furthermore, more than that, also, likewise, moreover,inaddition, what is more, for instance, for example
2. 转折关系
although, however, on the contrary, but, in spiteof,nevertheless, yet, otherwise, despite
3. 顺序关系
first, second, third, and so on, then, after, before, next
4. 因果关系
as a result, for, thus, because, for this reason, so,therefore,as, since, consequently, on account of
5. 归纳关系
as a result, finally, therefore, accordingly, in short,thus,consequently, in conclusion, so, in brief, in a word
几个用得比较多的逻辑句子：
1. As far as I am concerned, the advantages of … outweighits disadvantages.
2. Nevertheless, the disadvantages of … is undeniable.
3. To sum up/ In general/ On the whole/ In brief/ In short/ Inaword, it is true that … bring about both positive andnegativeresults. But we can try our best to reduce the negativeinfluenceto the least extent.
4. Obviously, in every aspect, …
5. This diagram unfolds a clear comparison between…and…
6. As to the other three, though the growth rates were not sohigh,they were indeed remarkable and impressive.
托福写作范文：A Rare Fossil Record
The preservation of embryos and juveniles is a rate occurrence in the fossil record. The tiny, delicate skeletons are usually scattered by scavengers or destroyed by weathering before they can be fossilized. Ichthyosaurs had a higher chance of being preserved than did terrestrial creatures because, as marine animals, they tended to live in environments less subject to erosion. Still, their fossilization required a suite of factors: a slow rate of decay of soft tissues, little scavenging by other animals, a lack of swift currents and waves to jumble and carry away small bones, and fairly rapid burial. Given these factors, some areas have become a treasury of well-preserved ichthyosaur fossils.
The deposits at Holzmaden, Germany, present an interesting case for analysis. The ichthyosaur remains are found in black, bituminous marine shales deposited about 190 million years ago. Over the years, thousands of specimens of marine reptiles, fish and invertebrates have been recovered from these rocks. The quality of preservation is outstanding, but what is even more impressive is the number of ichthyosaur fossils containing preserved embryos. Ichthyosaurs with embryos have been reported from 6 different levels of the shale in a small area around Holzmaden, suggesting that a specific site was used by large numbers of ichthyosaurs repeatedly over time. The embryos are quite advanced in their physical development; their paddles, for example, are already well formed. One specimen is even preserved in the birth canal. In addition, the shale contains the remains of many newborns that are between 20 and 30 inches long.
Why are there so many pregnant females and young at Holzmaden when they are so rare elsewhere? The quality of preservation is almost unmatched and quarry operations have been carried out carefully with an awareness of the value of the fossils. But these factors do not account for the interesting question of how there came to be such a concentration of pregnant ichthyosaurs in a particular place very close to their time of giving birth.
托福写作范文：Skyscrapers and Environment
In the late 1960’s, many people in North America turned their attention to environmental problems, and new steel-and-glass skyscrapers were widely criticized. Ecologists pointed out that a cluster of tall buildings in a city often overburdens public transportation and parking lot capacities.
Skyscrapers are also lavish consumers, and wasters, of electric power. In one recent year, the addition of 17 million square feet of skyscraper office space in New York City raised the peak daily demand for electricity by 120, 000 kilowatts-enough to supply the entire city of Albany, New York, for a day.
Glass-walled skyscrapers can be especially wasteful. The heat loss (or gain)through a wall of half-inch plate glass is more than ten times that through a typical masonry wall filled with insulation board. To lessen the strain on heating and air-conditioning equipment, builders of skyscrapers have begun to use double-glazed panels of glass, and reflective glasses coated with silver or gold mirror films that reduce glare as well as heat gain. However, mirror-walled skyscrapers raise the temperature of the surrounding air and affect neighboring buildings.
Skyscrapers put a severe strain on a city’s sanitation facilities, too. If fully occupied, the two World Trade Center towers in New York City would alone generate 2.25 million gallons of raw sewage each year-as much as a city the size of Stanford, Connecticut , which has a population of more than 109, 000.
托福写作范文：Museums
From Boston to Los Angeles, from New York City to Chicago to Dallas, museums are either planning, building, or wrapping up wholesale expansion programs. These programs already have radically altered facades and floor plans or are expected to do so in the not-too-distant future.
In New York City alone, six major institutions have spread up and out into the air space and neighborhoods around them or are preparing to do so.
The reasons for this confluence of activity are complex, but one factor is a consideration everywhere - space. With collections expanding, with the needs and functions of museums changing, empty space has become a very precious commodity.
Probably nowhere in the country is this more true than at the Philadelphia Museum of Art, which has needed additional space for decades and which received its last significant facelift ten years ago. Because of the space crunch, the Art Museum has become increasingly cautious in considering acquisitions and donations of art, in some cases passing up opportunities to strengthen its collections.
Deaccessing - or selling off - works of art has taken on new importance because of the museum’s space problems. And increasingly, curators have been forced to juggle gallery space, rotating one masterpiece into public view while another is sent to storage.
Despite the clear need for additional gallery and storage space, however," the museum has no plan, no plan to break out of its envelope in the next fifteen years," according to Philadelphia Museum of Art’s president.
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