57. During the eighteenth century, Little Turtle was chief of the Miami tribe whose territory became what is now Indiana and Ohio.
    十八世紀時，"小烏龜"是邁阿密部落的酋長，該部落的地盤就是今天的印第安那州和俄亥俄州。
　　
58. Among almost seven hundred species of bamboo, some are fully grown at less than a foot high, while others can grow three feet in twenty-four hours.
    在竹子的近七百個品種中，有的全長成還不到一英尺，有的卻能在二十四小時內(nèi)長出三英尺。
　　
59. Before staring on a sea voyage, prudent navigators learn the sea charts, study the sailing directions, and memorize lighthouse 本地s to prepare themselves for any conditions they might encounter.
    謹慎的航海員在出航前，會研究航向，記錄的燈塔的位置，以便對各種可能出現(xiàn)的情況做到有備無患。
　　
60. Of all the economically important plants, palms have been the least studied.
    在所有的經(jīng)濟作物中，棕櫚樹得到的研究最少。
　　
61. Buyers and sellers should be aware of new developments in technology can and does affect marketing activities.
    購買者和銷售者都應該留意技術(shù)的新發(fā)展，原因很簡單，因為技術(shù)能夠并且已經(jīng)影響著營銷活動。
　　
62. The application of electronic controls made possible by the microprocessor and computer storage have multiplied the uses of the modern 無效writer.
    電腦儲存和由于電子微處理機得以實現(xiàn)的電控運用成倍的增加了現(xiàn)代打字機的功能。
　　
63. The human skeleton consists of more than two hundred bones bound together by tough and relatively inelastic connective tissues called ligaments.
    人類骨骼有二百多塊骨頭組成，住些骨頭石油堅韌而相對缺乏彈性的，被稱為韌帶的結(jié)蒂組連在一起。
　　
64. The pigmentation of a pearl is influenced by the 無效 of oyster in which it develops and by the depth, temperature, and the salt content of the water in which the oyster lives.
    珍珠的色澤受到作為其母體牡蠣種類及牡蠣生活水域的深度，溫度和含鹽度的制約。