二、

　　Scientists have devised a way to determine roughly where a person has lived using a strand of hair , a technique that could help track the movements of criminal suspects or unidentified murder victims .

　　科學(xué)家們已經(jīng)設(shè)計(jì)出了一種利用人的一縷頭發(fā)頭發(fā)估計(jì)其住處的方法，這種技術(shù)有助于追蹤犯罪嫌疑人或者身份不明的謀殺受害者的動(dòng)向。

　　The method relies on measuring how chemical variations in drinking water show up in peoples hair.

　　該方法利用的是測(cè)量人們的頭發(fā)中所顯示的飲用水的化學(xué)成分差異。

　　Youre what you eat and drink, and thats recorded in you hair, said Thure Cerling, a geologist at the University of Utah.

　　你就是你吃的喝的東西，在你的毛發(fā)中都有記錄猶他州地質(zhì)學(xué)家托爾-瑟林說。

　　While U.S diet is relatively identical, water supplies vary.

　　美國人的飲食比較類似，但是水源的供應(yīng)差異較大。

　　The differences result from weather patterns.

　　這種差異是氣候模式導(dǎo)致的。

　　The chemical composition of rainfall changes slightly as raid clouds move.

　　隨著雨云的移動(dòng)，雨水的化學(xué)成分也有稍許的變化。

　　Most hydrogen and oxygen atoms in water are stable , but traces of both elements are also present as heavier isotopes .

　　水中的大部分氫原子和氧原子處于穩(wěn)定的狀態(tài)，但是兩種元素的軌跡都以質(zhì)量更重的同位素形式存在，較重的雨先落下。

　　The heaviest raid falls first .As a result, storms that form over the Pacific deliver heavier water to California than to Utah.

　　結(jié)果，來自于太平洋的暴風(fēng)雨會(huì)給加州帶來比猶他州質(zhì)量更重的水。

　　Similar patterns exist throughout the U.S. By measuring the proportion of heavier hydrogen and oxygen isotopes along a strand of hair, scientists can construct a geographic timeline.

　　相似的模式在全美都存在。通過測(cè)量一縷頭發(fā)中較重的氫氧同位素的比例，科學(xué)家們可以構(gòu)建一個(gè)地理學(xué)的時(shí)間軸。

　　Each inch of hair corresponds to about two months.

　　每一英寸的頭發(fā)對(duì)應(yīng)大概兩個(gè)月的時(shí)間。

　　Cerlings team collected tap water samples from 600 cities and constructed a mop of the regional differences.

　　瑟林的團(tuán)隊(duì)手機(jī)了來自600個(gè)城市的自來水樣本，構(gòu)建了區(qū)域間差異的地圖。

　　They checked the accuracy of the map by testing 200 hair samples collected from 65 barber shops.

　　他媽呢從65家理發(fā)店中收集了200份頭發(fā)樣品，用以測(cè)試該地圖的準(zhǔn)確性。

　　They were able to accurately place the hair samples in broad regions roughly corresponding to the movement of raid systems.

　　他們能夠準(zhǔn)確地把頭發(fā)的樣本定位到降雨體系的移動(dòng)粗略相對(duì)應(yīng)的大區(qū)

　　Its not good for pinpointing , Cerling said . Its good for eliminating many possibilities.

　　這種方法對(duì)于精確定位不一定有效瑟林說但可以排除很多可能性

　　Todd Park, a local detective, said the method has helped him learn more about an unidentified woman whose skeleton was found near Great Salt Lake.

　　地方探員托德帕克說，這種方法幫他獲得了一名身份不明的婦女的信息，該婦女的骸骨在大鹽湖附近被發(fā)現(xiàn)。

　　The woman was 5 feet tall. Police recovered 26 bones, a T-shirt and several strands of hair.

　　這名婦女有五英寸高。警察發(fā)現(xiàn)了26塊骨頭，一件襯衫和幾縷頭發(fā)。

　　When Park heard about the research, he gave the hair samples to the researchers.

　　當(dāng)帕聽說了該項(xiàng)研究之后，他把頭發(fā)的樣本交給了研究者。

　　Chemical testing showed that over the two years before her death, she moved about every two months.

　　化學(xué)測(cè)試表明，在她死前的兩年，她每?jī)蓚€(gè)月就會(huì)搬一次家。

　　She stayed in the Northwest, although the test could not be more specific than somewhere between eastern Oregon and western Wyoming.

　　她曾經(jīng)在西北待過，測(cè)試指出具體的地點(diǎn)是在俄勒岡州和懷俄明州西部之間的某地，但無法更精確了。

　　Its still a substantial area, Park said But it narrows it way down for me.

　　這仍然是片很大的區(qū)域，帕克說，但這種方法已經(jīng)為我縮小了范圍。

　　二、

　　Scientists have devised a way to determine roughly where a person has lived using a strand of hair , a technique that could help track the movements of criminal suspects or unidentified murder victims .

　　科學(xué)家們已經(jīng)設(shè)計(jì)出了一種利用人的一縷頭發(fā)頭發(fā)估計(jì)其住處的方法，這種技術(shù)有助于追蹤犯罪嫌疑人或者身份不明的謀殺受害者的動(dòng)向。

　　The method relies on measuring how chemical variations in drinking water show up in peoples hair.

　　該方法利用的是測(cè)量人們的頭發(fā)中所顯示的飲用水的化學(xué)成分差異。

　　Youre what you eat and drink, and thats recorded in you hair, said Thure Cerling, a geologist at the University of Utah.

　　你就是你吃的喝的東西，在你的毛發(fā)中都有記錄猶他州地質(zhì)學(xué)家托爾-瑟林說。

　　While U.S diet is relatively identical, water supplies vary.

　　美國人的飲食比較類似，但是水源的供應(yīng)差異較大。

　　The differences result from weather patterns.

　　這種差異是氣候模式導(dǎo)致的。

　　The chemical composition of rainfall changes slightly as raid clouds move.

　　隨著雨云的移動(dòng)，雨水的化學(xué)成分也有稍許的變化。

　　Most hydrogen and oxygen atoms in water are stable , but traces of both elements are also present as heavier isotopes .

　　水中的大部分氫原子和氧原子處于穩(wěn)定的狀態(tài)，但是兩種元素的軌跡都以質(zhì)量更重的同位素形式存在，較重的雨先落下。

　　The heaviest raid falls first .As a result, storms that form over the Pacific deliver heavier water to California than to Utah.

　　結(jié)果，來自于太平洋的暴風(fēng)雨會(huì)給加州帶來比猶他州質(zhì)量更重的水。

　　Similar patterns exist throughout the U.S. By measuring the proportion of heavier hydrogen and oxygen isotopes along a strand of hair, scientists can construct a geographic timeline.

　　相似的模式在全美都存在。通過測(cè)量一縷頭發(fā)中較重的氫氧同位素的比例，科學(xué)家們可以構(gòu)建一個(gè)地理學(xué)的時(shí)間軸。

　　Each inch of hair corresponds to about two months.

　　每一英寸的頭發(fā)對(duì)應(yīng)大概兩個(gè)月的時(shí)間。

　　Cerlings team collected tap water samples from 600 cities and constructed a mop of the regional differences.

　　瑟林的團(tuán)隊(duì)手機(jī)了來自600個(gè)城市的自來水樣本，構(gòu)建了區(qū)域間差異的地圖。

　　They checked the accuracy of the map by testing 200 hair samples collected from 65 barber shops.

　　他媽呢從65家理發(fā)店中收集了200份頭發(fā)樣品，用以測(cè)試該地圖的準(zhǔn)確性。

　　They were able to accurately place the hair samples in broad regions roughly corresponding to the movement of raid systems.

　　他們能夠準(zhǔn)確地把頭發(fā)的樣本定位到降雨體系的移動(dòng)粗略相對(duì)應(yīng)的大區(qū)

　　Its not good for pinpointing , Cerling said . Its good for eliminating many possibilities.

　　這種方法對(duì)于精確定位不一定有效瑟林說但可以排除很多可能性

　　Todd Park, a local detective, said the method has helped him learn more about an unidentified woman whose skeleton was found near Great Salt Lake.

　　地方探員托德帕克說，這種方法幫他獲得了一名身份不明的婦女的信息，該婦女的骸骨在大鹽湖附近被發(fā)現(xiàn)。

　　The woman was 5 feet tall. Police recovered 26 bones, a T-shirt and several strands of hair.

　　這名婦女有五英寸高。警察發(fā)現(xiàn)了26塊骨頭，一件襯衫和幾縷頭發(fā)。

　　When Park heard about the research, he gave the hair samples to the researchers.

　　當(dāng)帕聽說了該項(xiàng)研究之后，他把頭發(fā)的樣本交給了研究者。

　　Chemical testing showed that over the two years before her death, she moved about every two months.

　　化學(xué)測(cè)試表明，在她死前的兩年，她每?jī)蓚€(gè)月就會(huì)搬一次家。

　　She stayed in the Northwest, although the test could not be more specific than somewhere between eastern Oregon and western Wyoming.

　　她曾經(jīng)在西北待過，測(cè)試指出具體的地點(diǎn)是在俄勒岡州和懷俄明州西部之間的某地，但無法更精確了。

　　Its still a substantial area, Park said But it narrows it way down for me.

　　這仍然是片很大的區(qū)域，帕克說，但這種方法已經(jīng)為我縮小了范圍。