上半部分50句背诵.doc

1. Anthropologists have discovered that fear, happiness, sadness, and surprise are universally reflected in facial expressions.1.人类学家们已经发现，恐惧，快乐，悲伤和惊奇都会行之于色，这在全人类是共通的。. The greater the population there is in a locality, the greater the need there is for water, transportation, and disposal of refuse.2.一个地方的人口越多，其对水，交通和垃圾处理的需求就会越大。.It is more difficult to write simply, directly, and effectively than to employ flowery but vague expressions that only obscure one’s meaning.3.简明，直接，有力的写作难于花哨，含混而意义模糊的表达。. The difference between libel and slander is that libel is printed while slander is spoken.4.诽谤和流言的区别在于前者是书面的，而后者是口头的。. The knee is the joints where the thigh bone meets the large bone of the lower leg.5.膝盖是大腿骨和小腿胫的连接处。. Essentially, a theory is an abstract, symbolic representation of what is conceived to be reality.6.理论在本质上是对认识了的现实的一种抽象和符号化的表达。.Long before children are able to speak or understand a language, they communicate through facial expressions and by making noises.7.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。. When it is struck, a tuning fork produces an almost pure tone, retaining its pitch over a long period of time.8.音叉被敲击时，产生几乎纯质的音调，其音量经久不衰。. Eliminating problems by transferring the blame to others is often called scape-goating.9.用怪罪别人的办法来解决问题通常被称为寻找替罪羊。. The chief foods eaten in any country depend largely on what grows best in its climate and soil.10.一个国家的主要食物是什么，大体取决于什么作物在其天气和土壤条件下生长得最好。.Over a very large number of trials, the probability of an event’s occurring is equal to the probability that it will not occur.11.在大量的实验中，某一事件发生的几率等于它不发生的几率。.Most substance contract when they freeze so that the density of a substance’s solid is higher than the density of its liquid.12.大多数物质遇冷收缩，所以他们的密度在固态时高于液态。. The mechanism by which brain cells store memories is not clearly understood.13.大脑细胞储存记忆的机理并不为人明白。.By the middle of the twentieth century, painters and sculptors in the United States had begun to exert a great worldwide influence over art.14.到了二十一