新東方網託福頻道在此與大家分享託福閱讀之大米草 Spartina，其中包括託福閱讀詞彙及詞彙在文中的使用以及相關題目。希望對大家複習託福閱讀有所幫助。
P1： Spartina alterniflora, known as cordgrass, is a deciduous, perennial flowering plant native to the Atlantic coast and the Gulf Coast of the United States. It is the dominant native species of the lower salt marshes along these coasts, where it grows in the intertidal zone (the area covered by water some parts of the day and exposed others).
難詞解析：
deciduous adj. 落葉的;短暫的
perennial adj. 不斷出現的;多年生的
dominant adj./n.處於支配地位的;佔優勢的人
expose v. 使顯露;揭露
難句解析：
Spartina alterniflora, (known as cordgrass, ) is a deciduous, perennial flowering plant native to the Atlantic coast and the Gulf Coast of the United States.
大米草，俗稱網茅，是一種落葉的多年生開花植物，原產自美國大西洋沿岸和墨西哥灣地區。
P2： These natural salt marshes are among the most productive habitats in the marine environment. Nutrient-rich water is brought to the wetlands during each high tide, making a high rate of food production possible. As the seaweed and marsh grass leaves die, bacteria break down the plant material, and insects, small shrimp like organisms, fiddler crabs, and marsh snails eat the decaying plant tissue, it, and excrete wastes high in nutrients. Numerous insects occupy the marsh, feeding on living or dead cordgrass tissue, and redwing blackbirds, sparrows, rodents, rabbits, and deer feed directly on the cordgrass. Each tidal cycle carries plant material into the offshore water to be used by the subtidal organisms.
難詞解析：
productive adj. 生產力高的;富有成效的
break down 故障;崩塌;中斷
organism n. 微生物
fiddle v./ n. 不停擺弄;調試;弦樂器
snail v./ n. 蝸牛;緩慢行動
excrete v. 排洩;分泌
難句解析：
As the seaweed and marsh grass leaves die,] bacteria break down the plant material, and insects, small shrimplike organisms, fiddler crabs, and marsh snails eat the decaying plant tissue, it, and excrete wastes high in nutrients.
隨著海草和沼澤禾草葉子的死亡，細菌將植物體分解，昆蟲、小型蝦狀浮遊生物、招潮蟹和沼澤蝸牛吃掉了腐爛的植物組織，消化後排出富含營養的排洩物。
P3： Spartina is an exceedingly competitive plant. It spreads primarily by underground stems; colonies form when pieces of the root system or whole plants float into an area and take root or when seeds float into a suitable area and germinate. Spartina establishes itself on substrates ranging from sand and silt to gravel and cobble and is tolerant of salinities ranging from that of near freshwater (0.05 percent) to that of salt water (3.5 percent). Because they lack oxygen, marsh sediments are high in sulfides that are toxic to most plants. Spartina has the ability to take up sulfides and convert them to sulfate, a form of sulfur that the plant can use; this ability makes it easier for the grass to colonize marsh environments. Another adaptive advantage is Spartina’s ability to use carbon dioxide more efficiently than most other plants.
難詞解析：
exceedingly adj. 非常的;超越的
germinate v./ n. 發芽
convert v. / n. 轉變;改建;換算
adaptive adj. 能適應的
難句解析：
Spartina has the ability to take up sulfides and convert them to sulfate, a form of sulfur (that the plant can use); this ability makes it easier for the grass to colonize marsh environments.
這種能力使得米草屬植物能夠在沼澤環境中生存。另一個適應性優勢就是米草屬植物比其他植物能更有效的利用二氧化碳的能力。
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P1: 大米草及其生長區域__________
P2: _____環境營養豐富高產(部分原因是因為米草屬植物)
P3: 大米草極具競爭力
競爭優勢1________________
競爭優勢2________________
ANSWERS：
P1： Atlantic coast and the Gulf Coast of the United States
P2: marine environment
P3: Spartina has the ability to take up sulfides and convert them to sulfate; Spartina’s ability to use carbon dioxide more efficiently than most other plants
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（責任編輯：馬薈）