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 typewriter. 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，有些骨頭是由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 type 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。

　　65. Although mockingbirds superbly mimic the songs and calls of many birds，they can nonetheless be quickly identified as mockingbirds by certain aural clues. 盡管模仿鳥學很多種鳥的鳴叫聲惟妙惟肖，但人類還是能夠依其聲音上的線索很快識別它們。

　　66. Not only can walking fish live out of water，but they can also travel short distances over land. 鲇魚不僅可以離開水存活，還可以在岸上短距離移動。

　　67. Scientists do not know why dinosaurs became extinct，but some theories postulate that changers in geography，climate，and sea levels were responsible. 科學家不知道恐龍為何絕種了，但是一些理論推斷是地理，氣候和海平面的變化造成的。

　　68. The science of horticulture，in which the primary concerns are maximum yield and superior quality，utilizes information derived from other sciences. 主要目的在于豐富和優(yōu)質(zhì)的農(nóng)藝學利用了其他科學的知識。

　　69. Snow aids farmers by keeping heart in the lower ground levels，thereby saving the seeds from freezing. 雪對農(nóng)民是一種幫助，因為它保持地層土壤的溫度，使種子不致凍死。

　　70. Even though the precise qualities of hero in literary words may vary over time，the basic exemplary function of the hero seems to remain constant. 當代文學作品中的英雄本色雖各有千秋，但其昭世功力卻是恒古不變的。

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