托福词汇教程汇总和更新

041. The Earth comprises three principal layers: the dense, iron-rich core, the mantle made of silicate rocks tha... [查看全文]

036. Each one was virtually a stone town, which is why the Spanish would later call them pueblos, the Spanish ... [查看全文]

031. The quality of preservation is outstanding, but what is even more impressive is the number of ichthyosaur f... [查看全文]

026. Some botanists hypothesized that the living cells of plants acted as pumps. But many experiments demonstrated... [查看全文]

021. But in many cases consumers are misled if they believe organic foods can maintain health and provide better... [查看全文]

017. After the peak year of 1957, the birth rate in Canada began to decline. It continued falling until in 196... [查看全文]

013. The DSDP's drill ship, the Glomar Challenger, was able to maintain a steady position on the ocean's... [查看全文]

009. Thousands of tons were extracted before 1875, when it was first noticed that the tar contained fossil remai... [查看全文]

005. The increasing water pressure under the glacier might lift it off its bed, overcoming the friction between ... [查看全文]

001. Most of these leaders were involved in public life as reformers, activists working for women's right to... [查看全文]