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Silver and silver objects had multiple meanings in late-eighteenth-century North America. Insights about social attitudes and the buying habits of consumers come partly from the re...

  Climate change has been linked to greenhouse gases in Earth's atmosphere that allow sunlight to reach the planet's surface while trapping the infrared energy that it emits...

The growing population of eighteenth-century Europe increased demand for cloth to clothe people. Urban merchants turned to rural people for additional, inexpensive labor: farming f...

雅思阅读真题精讲第001篇：Morse code

雅思阅读真题精讲第002篇：Otters

雅思阅读真题精讲第003篇：Soviet’s New Working Week