新托福寫作必記的20條經(jīng)典句子（二）

新托福寫作必記的經(jīng)典句子：

11. Acids are chemical compounds that， in water solution， have a sharp taste， a corrosive action on metals， and the ability to turn certain blue vegetable dyes red.

12. Billie Holiday‘s reputation as a great jazz-blues singer rests on her ability to give emotional depth to her songs.

13. Essentially， a theory is an abstract， symbolic representation of what is conceived to be reality.

14. Long before children are able to speak or understand a language， they communicate through facial expressions and by making noises.

15. Thanks to modern irrigation， crops now grow abundantly in areasswheresonce nothing but cacti and sagebrush could live.

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16. The development of mechanical timepieces spurred the search for more accurate sundials with which to regulate them.

17. Anthropology is a science in that anthropologists use a rigorous set of methods and techniques to document observations that can be checked by others.

18. Fungi are important in the process of decay， which returns ingredients to the soil， enhances soil fertility， and decomposes animal debris.

19. When it is struck， a tuning fork produces an almost pure tone， retaining its pitch over a long period of time.

20. Although pecans are most plentiful in the southeastern part of the United States， they are found as far north as Ohio and Illinois.

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