86. Artificial flowers are used for scientific as well as for decorative purposes. They are made from a variety of materials, such as way and glass, so skillfully that they can scarcely be distinguished from natural flowers.
86.人造花卉即可用于科學(xué)目的，也可用于裝飾目的，它們可以用各種各樣的材料制成，臂如蠟和玻璃；其制作如此精巧，幾乎可以以假亂真。
87. Three years of research at an abandoned coal mine in Argonne, Illinois, have resulted in findings that scientists believe can help reclaim thousands of mine disposal sites that scar the coal-rich regions of the United States.
87.在伊利諾州Angonne市的一個(gè)廢棄煤礦的三年研究取得了成果，科學(xué)家們相信這些成果可以幫助改造把美國產(chǎn)煤區(qū)弄得傷痕累累的數(shù)千個(gè)舊煤場。
88. When the persuading and the planning for the western railroads had been completed, the task remained: the dangerous, sweaty, backbreaking, brawling business of actually building the lines.
88.當(dāng)有關(guān)西部鐵路的說服和規(guī)劃工作終于完成后，真正艱難的任務(wù)還沒有開始；即危險(xiǎn)，吃力，需要傷筋動(dòng)骨和吵吵嚷嚷的建造這些鐵路的實(shí)際工作。
89. 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 is collections.
89.由于空間不足，藝術(shù)博物館在考慮購買和接受捐贈(zèng)的藝術(shù)品是越來越慎重，有些情況下放棄其進(jìn)一步改善收藏的機(jī)會(huì)。
90. The United States Constitution requires that President be a natural-born citizen, thirty-five years of age or older, who has lived in the United States for a minimum of fourteen years.
90.美國憲法要求總統(tǒng)是生于美國本土的公民，三十五歲以上，并且在美國居住了至少十四年。
86.人造花卉即可用于科學(xué)目的，也可用于裝飾目的，它們可以用各種各樣的材料制成，臂如蠟和玻璃；其制作如此精巧，幾乎可以以假亂真。
87. Three years of research at an abandoned coal mine in Argonne, Illinois, have resulted in findings that scientists believe can help reclaim thousands of mine disposal sites that scar the coal-rich regions of the United States.
87.在伊利諾州Angonne市的一個(gè)廢棄煤礦的三年研究取得了成果，科學(xué)家們相信這些成果可以幫助改造把美國產(chǎn)煤區(qū)弄得傷痕累累的數(shù)千個(gè)舊煤場。
88. When the persuading and the planning for the western railroads had been completed, the task remained: the dangerous, sweaty, backbreaking, brawling business of actually building the lines.
88.當(dāng)有關(guān)西部鐵路的說服和規(guī)劃工作終于完成后，真正艱難的任務(wù)還沒有開始；即危險(xiǎn)，吃力，需要傷筋動(dòng)骨和吵吵嚷嚷的建造這些鐵路的實(shí)際工作。
89. 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 is collections.
89.由于空間不足，藝術(shù)博物館在考慮購買和接受捐贈(zèng)的藝術(shù)品是越來越慎重，有些情況下放棄其進(jìn)一步改善收藏的機(jī)會(huì)。
90. The United States Constitution requires that President be a natural-born citizen, thirty-five years of age or older, who has lived in the United States for a minimum of fourteen years.
90.美國憲法要求總統(tǒng)是生于美國本土的公民，三十五歲以上，并且在美國居住了至少十四年。