六级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 murdervictims.

科学家们发明了一种方法，利用一缕头发大致确定一个人的居住地，这项技术有助于追踪犯罪嫌疑人或身份不明的谋杀受害者的行踪。

2015年12月听力原文

六级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.

当地侦探托德·帕克（Todd Park）说，这种方法帮助他更多地了解了一名身份不明的妇女，她的骨架在大盐湖附近被发现。

2015年12月六级真题（第二套）听力 Section C

四级Then we fed them four unidentified samples of cola one at a time, regular colas for the one group, diet versions for the other.

然后，我们一次给他们喂四种未经鉴定的可乐样品，一组给他们喂普通可乐，另一组给它们喂减肥可乐。

1996年1月大学英语四级(CET-4)真题

四级Scientists have devised a way to determine roughly where a person has lived using a strand(缕) of hair , a technique that could help track the movements of criminal suspects or unidentified murder victims .

科学家们设计了一种方法，用一根绳子粗略地确定一个人住在哪里(缕) 这种技术可以帮助追踪犯罪嫌疑人或身份不明的谋杀案受害者的行踪。

2009年6月英语四级考试真题

四级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.

当地侦探托德·帕克（Todd Park）表示，这种方法帮助他了解了一名身份不明的女子的更多信息，该女子的骨架在大盐湖附近被发现。

2009年6月英语四级考试真题

考研If we take this as a reasonable explanation for UFOs (unidentified flying objects), questions immediately come up.

如果我们将此作为不明飞行物（不明飞行物）的合理解释，问题就会立即出现。

1989年全国硕士研究生入学统一考试英语试题