1 . The ancient Hopewell people of North America probably cultivated corn and other crops, but hunting and gathering were still of critical importance in their economy
2 . Let’s go there / Let’s go to the … （Let’s go home ）
3 . Of all the economically important plants, palms have been the least studied
4 . (红嘴红脚，灰蓝色的毛，只是后背还没有生出珍珠似的白点;它好肥，整个身子好像一个蓬松的球儿。
5 . (“我越来越体会到我当初是多么幸运。”
6 . Alexander Graham Bell曾告诉家人，他更愿意让后人记住他是聋子的老师，而非电话的发明者。
7 . 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
8 . Ilikeit
9 . There is only one difference between an old man and a young one: the young man has a glorious future before him and old one has a splendid future behind him: and maybe that is where the rub is
10 . 物理学和化学的一个成果是使得科学家们能在生物学和医学上获得重大发现。
1 . (“在成长的过程中能够谨慎地把握住生活的小船，使它不被哪一股风刮倒”，意思是说：不会自傲和自悲，有父母时常的提醒，在爱的鼓舞下，不断前进。
2 . Since the consumer considers the best fruit to be that which is the most attractive, the grower must provide products that satisfy the discerning eye
3 . How many students are there in your class ? Thirty-five(数字
4 . 电视，这项从迅速变化和成长为标志的最普及和最有影响力的现代技术，正在步入一个新时代，一个极为成熟和多样化的时代，这将重塑我们的生活和世界。
5 . Lucretia Mott’s influence was so significant that she has been credited by some authorities as the originator of feminism in the United States
6 . (他发誓永不暴露我的住地，谁知他竟然见利忘义!您与这种灵魂肮脏的小人一起来残害无辜，难道不怕天下人笑话吗?
7 . I like this one
8 . 膝盖是大腿骨和小腿胫的连接处。
9 . 他的教书生涯始于麻省理工学院，但是William Rainey Harper把他吸引到了新成立的芝加哥大学。他在那里正式任职长达整整一代人的时间。他的高级课上的学生觉得他在课上古板得可怕，但私下交流却富有同情和理解。
10 . 在竹子的近七百个品种中，有的全长成还不到一英尺，有的却能在二十四小时内长出三英尺。
1 . 史前的人们制造颜料是将植物和泥土等原料磨成粉末，然后加水。
2 . Is this the library ? Yes , it is
3 . 使用多种多样的符号可以在一张地图里放进大量的信息。
4 . The mechanism by which brain cells store memories is not clearly understood
5 . Often very annoying weeds, goldenrods crowd out less hardy plants and act as hosts to many insect pests
6 . 尤它州制造业的年产值大于其工业和农业的总和。
7 . 美国宪法要求总统是生于美国本土的公民，三十五岁以上，并且在美国居住了至少十四年。
8 . When the persuading and the planning for the western railroads had finally been completed, the really challenging task remained: the dangerous, sweaty, backbreaking, brawling business of actually building the lines
9 . Itfitsmewell
10 . 计算机储存和由于电子微处理机得以实现的电控运用成倍的增加了现代打字机的功能。
1 . 尽管模仿鸟学很多种鸟的鸣叫声惟妙惟肖，但人类还是能够依其声音上的线索很快识别它们。
2 . Before staring on a sea voyage, prudent navigators learn the sea charts, study the sailing directions, and memorize lighthouse locations to prepare themselves for any conditions they might encounter
3 . This red T-shirt is pretty ( nice / beautiful / !
4 . It is more difficult to write simply, directly, and effectively than to employ flowery but vague expressions that only obscure one’s meaning
5 . 对风暴动力学的研究是为了提高风暴预测从而减少损失，避免人员伤亡。
6 . One of the wildest and most inaccessible parts of the United States is the Everglades where wildlife is abundant and largely protected
8 . It is the interaction between people, rather than the events that occur in their lives, that is the main focus of social psychology
9 . Research into the dynamics of storms is directed toward improving the ability to predict these events and thus to minimize damage and avoid loss of life
10 . 任何盈利组织若要生存，最终都必须生产出消费者可用或需要的产品。
1 . 老人和年轻人之间只有一个区别：年轻人的前面有辉煌的未来，老年人灿烂的未来却已在它们身后。这也许就是困难之所在。
2 . With modern offices becoming more mechanized, designers are attempting to personalize them with warmer, less severe interiors
3 . 诽谤和流言的区别在于前者是书面的，而后者是口头的。
4 . 谨慎的航海员在出航前，会研究航向，记录的灯塔的位置，以便对各种可能出现的情况做到有备无患。
5 . Anthropology is a science in that anthropologists use a rigorous set of methods and techniques to document observations that can be checked by others
6 . 电视不仅仅是一件电器；它是表达的手段和交流的载体并因此成为联系他人的有力工具。
7 . Lucretia Mott’s的影响巨大，所以一些权威部门认定她为美国女权运动的创始人。
8 . 这一句话写出了“我”对母亲的“精彩极了”的赞扬声和父亲“糟糕透了”的批评声，都有一个正确的认识，那就是父母共同的出发点——“爱”。正因为“我”，明白了父母的爱，所以在成长的过程中能够谨慎的把握住生活的小船，使它不被哪一股风刮倒，意思是说，不会产生自傲和自悲。有父母时常的提醒，在爱鼓励下，不断前进。
9 . The beaver chews down trees to get food and material with which to build its home
10 . 文中次出现。因为他是父亲对儿子的承诺，是儿子在绝境中满怀信心的力量源泉，也是父亲坚持到底决不放弃的原因。反复出现，多处呼应，通过父亲的责任感充分表现了崇高的父爱，通过儿子对父亲诺言的深信不疑说明对父亲多么信赖。了不起的父与子共同创造了奇迹。
1 . (他斥责调达背信弃义，恩将仇报，并重重惩罚了他。
2 . 恐怕没有谁对大多数美国人的日常生活影响能超过汽车生产的先驱亨利福特。
3 . Perfectly matched pearls, strung into a necklace, bring a far higher price than the same pearls told individually
4 . The chief foods eaten in any country depend largely on what grows best in its climate and soil
5 . According to anthropologists, the earliest ancestors of humans that stood upright resembled chimpanzees facially, with sloping foreheads and protruding brows
6 . 小惠考试没考好，难过得哭了。我会对她说：小惠，别难过了。考试过程中谁都会紧张，难免会失误。这次，只是一时疏忽造成的。失败是成功之母!我相信你下次一定能考好。
7 . 珍珠的色泽受到作为其母体牡蛎种类及牡蛎生活水域的深度，温度和含盐度的制约。
8 . What are they ? These are your baby pants They’re so small
9 . Because its leaves remain green long after being picked, rosemary became associated with the idea of remembrance
10 . The science of horticulture, in which the primary concerns are maximum yield and superior quality, utilizes information derived from other sciences
1 . 由于苯酚对人体带有刺激性作用，它基本上已不再被当作常用的防腐剂了。
2 . Insects would make it impossible for us to live in the world; they would devour all our crops and kill our flocks and herds, if it were not for the protection we get from insect-eating animals
3 . 十八世纪时，"小乌龟"是迈阿密部落的酋长，该部落的地盘就是今天的印第安纳州和俄亥俄州。
4 . 未来主义，二十世纪早期的一个艺术思潮。拒绝一切传统，试图通过强调机械和动态来美化生活。
5 . The activities of the international marketing researcher are frequently much broader than those of the domestic marketer
6 . 更让人吃惊的事实是监禁的数目和比例在过去的二十年中翻了一番还有余，以及累犯率——即再次拘押的比例——为百分之六十强。
7 . 年看见哈雷慧星的千百万人当中，有多少人能够长寿到足以目睹它在二十一世纪的回归呢？
8 . 使用精心挑选的无意义词汇，可以检验语言学科里许多基本的假定。
9 . 在所有的经济作物中，棕榈树得到的研究最少。
10 . 我们位年强人振奋。它们带有自由的气息，他们不会为狭隘的野心和贪婪享受而孜孜以求。他们不是焦虑的向上爬的人，他们不会对物质性的东西难舍难分。
1 . 儿童在能说或能听懂语言之前，很久就会通过面部表情和靠发出噪声来与人交流了。
2 . 大陆分水岭是指北美落基山脉上的一道想象线，该线把大西洋流域和太平洋流域区分开来。
3 . The canteen is on the first floor This way , please
4 . Scientists do not know why dinosaurs became extinct, but some theories postulate that changers in geography, climate, and sea levels were responsible
5 . 人们已经发现，某些蝙蝠发出尖叫声并靠接受回响来锁定和避免障碍物——或者找到它们赖以为生的昆虫。蝙蝠这种回响定位法常拿来和原理与之很相近似的雷达相比。
6 . Stone does decay, and so tools of long ago have remained when even the bones of the man who made them have disappeared without trace
7 . 用怪罪别人的办法来解决问题通常被称为寻找替罪羊。
8 . Your school is beautiful ( cool …
9 . Fungi are important in the process of decay, which returns ingredients to the soil, enhances soil fertility, and decomposes animal debris
10 . 水獭啃倒树木，以便取食物并获得造窝的材料。
1 . As the time and cost of making a clip drop to a few days and a few hundred dollars, engineers may soon be free to let their imaginations soar without being penalized by expensive failure
2 . 伊莉萨白市，一个重要的航运和制造业中心，坐落于新泽西州的东部。
3 . We have a new computer room
4 . 相互般配的珍珠，串成一条项链，就能卖到比单独售出好得多的价钱。
5 . Arid regions in the southwestern United States have become increasingly inviting playgrounds for the growing number of recreation seekers who own vehicles such as motorcycles or powered trail bikes and indulge in hill-climbing contests or in caving new trails in the desert
6 . 人类学是一门科学，因为人类学家采用一整套强有力的方法和技术来记录观测结果，而这样记录下来的观测结果是供他人核查的。
7 . Though once quite large, the population of the bald eagle across North America has drastically declined in the past forty years
8 . The difference between libel and slander is that libel is printed while slander is spoken
9 . 简明，直接，有力的写作难于花哨，含混而意义模糊的表达。
10 . 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
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