【正文】 conditions they might encounter. ，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。 75. Though once quite large, the population of the bald eagle across North America has drastically declined in the past forty years. ，但在近四十年中全北美的禿頭鷹數(shù)量急劇下降。 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. ，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。 97. I am always amazed when I hear people saying that sport creates goodwill between the nations, and that if only the mon peoples of the world could meet one another at football or cricket, they would have no inclination to meet on the battlefield. ，說世界各地的普通人只要能在足球場或板球場上相遇就會沒有興趣在戰(zhàn)場上相遇的話，我都倍感詫異。這也許就是困難之所在。他的高級作文課上的學生覺得他在課上古板得可怕，但私下交流卻富有同情和理解。 71. People in prehistoric times created paints by grinding materials such as plants and clay into power and then adding water. ，然后加水。 55. The history of painting is a fascinating chain of events that probably began with the very first pictures ever made. ，其源頭大概可以上溯到最早的圖畫。 41. The annual worth of Utah39。 28. Elizabeth Blackwell, the first woman medical doctor in the United States, founded the New York Infirmary, an institution that has always had a pletely female medical staff. 28. Elizabeth Blackwell，美國第一個女醫(yī)生，創(chuàng)建了員工一直為女性紐約診所。 14. Long before children are able to speak or understand a language, they municate through facial expressions and by making noises. ，很久就會通過面部表情和靠發(fā)出噪聲來與人交流了。 2. Of the millions who saw Haley39。s reputation as a great jazzblues singer rests on her ability to give emotional depth to her songs. 12. Billie Holiday39。 25. The mechanism by which brain cells store memories is not clearly understood. 。 38. The activities of the international marketing researcher are frequently much broader than those of the domestic marketer. 。 52. Anarchism is a term describing a cluster of doctrines and attitudes whose principal uniting feature is the belief that government is both harmful and unnecessary. ，它們的主要共同點在于相信government是有害的，沒有必要的。 68. The science of horticulture, in which the primary concerns are maximum yield and superior quality, utilizes inFORMation derived from other sciences. 。 83. Even more shocking is the fact that the number and rate of imprisonment have more than doubled over the past twenty years, and recidivismthat is the rate for rearrestis more than 60 percent. ，以及累犯率——即再次拘押的比例——為百分之六十強。 　　94. It is true that during their explorations they often faced difficulties and dangers of the most perilous nature, equipped in a manner which would make a modern climber shudder at the thought, but they did not go out of their way to court such excitement. ，他們在探險中遇到了極具威脅性的困難和危險，而他們的裝備會讓一個現(xiàn)代登山者想一想都會渾身顫栗。蝙蝠這種回響定位法常拿來和原理與之很相近似的雷達相比。 89. Because of the space crunch, the Art Museum has bee increasingly cautious in considering acquisitions and donations of art, in some cases passing up opportunities to strengthen is collections. ，藝術博物館在考慮購買和接受捐贈的藝術品是越來越慎重，有些情況下放棄其進一步改善收藏的機會。 78. As a result of what is now know in physics and chemistry, scientists have been able to make important discoveries in biology and medicine. 。 62. The application of electronic controls made possible by the microprocessor and puter storage have multiplied the uses of the modern 無效writer. 。 46. According to anthropologists, the earliest ancestors of humans that stood upright resembled chimpanzees facially, with sloping foreheads and protruding brows. ，直立行走的人的鼻祖面部輪廓與黑猩猩相似，額頭后傾，眉毛突出。 35. Futurism, an early twentiethcentury movement in art, rejected all