分词做后置定语划主干-有解析.doc

分词后置定语划主干Groundwater is the word used to describe water 后置定语that saturates the ground定从，渗透到地底下, filling all the available spaces.修饰water 地下水是指渗入到地下并将所有岩石空隙填满的水。They are found wherever fast rivers carrying loads of coarse sediment携带着粗糙的沉淀物(泥沙之类的东西） once flowed. 在湍急的携载着泥沙的河流曾经流过的地方都能找到它们的踪迹But note that porosity is not the same as permeability, which measures the ease定从 with which water can flow through a material定从; this depends on the sizes of the individual cavities洞 and the crevices缝 linking them.后置定语但需要注意的是，多孔性与渗透性是不同的。渗透性衡量的是水渗透物质的难易程度，它取决于与单个空隙以及连接空隙间裂缝的大小。The process perceived by these anthropologists 分词后置may be summarized briefly.这些人类学家们推论过程可简要概括如下But the myth神话s that have grown up around the rites定从礼仪 may continue as part of the groups oral tradition口头传统 and may even come to be acted out act sth out act a part, usu in a real-life situation and for some purpose 扮演一角色（通常於现实生活中为某种目的）: She acted out the role of wronged lover to make him feel guilty. 她扮作受了冤枉的情人, 好让他感到内疚.under conditions divorced from these rites分词后置定语. 不过在这些仪式中发展起来的神话故事继续在人们的口头流传，甚至可能脱离了仪式而被演绎着。1. In 1979, a team looking for fossils in northern Pakistan 现在分词后置定语found what proved to be the oldest fossil whale. 宾从1979 年，在巴基斯坦北部，一个寻找化石的考察队发掘到了最古老的鲸鱼化石Several skeletons of another early whale, Basilosaurus, were found in sediment沉淀物s left by the Tethys Sea分词后置 and now exposed in the Sahara desert. 人们在古地中海残留的沉积物中发现了另一类早期鲸鱼Basilosaurus 的一些骨骸，这些骨骸如今暴露在撒哈拉大沙漠上The process may be accelerated in subsequent decades if global warming resulting from air pollution 分词后置定语seriously increases. 这个过程在之后会加剧，如果环境污染造成的全球变暖加剧。The semiarid lands bordering the deserts 分词后置定语exist in a delicate ecological balance and are limited in their potential to adjust to increased environmental pressures.和沙漠接壤的半干旱地区存在于脆弱的生态平衡中，不能够适应不断增加的环境压力。The final major human cause of desertification is soil salinization resulting from overirrigation.过渡灌溉沙漠化最后一个人为因素是过渡灌溉造成的土壤盐碱化。To take an extreme example, farmlands dominated by a single crop are so unstable that one year of bad weather or the invasion of a single pest can destroy the entire crop. 举个极端的例子，在单一作物的农田中，一年的恶劣天气或单一害虫的入侵就可以摧毁所有作物。Alternatively, stability can be defined as the speed with which an ecosystem returns to a particular form定从 following a major disturbance分词后置定语, such as a fire.另外，稳定性也可以界定为生态系统在经历了严重破坏之后回复原貌的速度，比如火灾。The destruction caused by the volcanic explosion of Mount St. Helens分词后置, in the northwestern United States, for example, pales变得苍白 in comparison to the destruction caused by humans.就像美国西北部圣海伦火山的猛烈喷发所造成的破坏，在人类活动对环境造成的的破坏面前也相形见绌。He believes that as far back as 30,000 B.C., hunters may have used a system of notation, engraved on bone and stone,后置定语 to mark phases of the Moon. 他认为在公元前 30000 年，猎人们可能使用了一种刻在骨头或石头上的标志法来标记不同的月相。In addition to除了 other artworks, figurines小雕像 representing描绘 画 the human female in exaggerated form分词短语后置定语 have also been found at Upper Paleolithic sites.人们还在后期旧石器时代的遗址上发现了以夸张的形式描绘妇女的小雕塑。Petroleum, consisting of包括 crude oil and natural gas, seems to originate from起源于 organic matter in marine sediment.海底沉淀物中的有机物石油是由原油和天然气组成，都源自于海洋的有机沉淀。At the same time, operators of the first printing presses run by steam rather than by hand 分词后置定语found it possible to produce a thousand pages in an hour rather than thirty. 那时，第一台利用蒸汽发动的印刷机 1 小时就能完成手动印刷机 30 小时完成的工作量。The companies building the canals to transport coal后置定语 needed surveyors测量员 to help them find the coal deposits worth mining值得开采的矿藏 as well as to determine the best courses for the canals.确定运河建设的最好路线他工作的那家公司致力于开掘一条运河来运输煤矿，需要测量员帮助他们探