They may be ancient "beer-making tools", and the earliest direct evidence of beer brewing in China, the researchers reported in the Proceedings of the National Academy of Sciences.
2017年6月四级真题(第一套)阅读 Section A
英语六级真题
Terrie Moffitt's paper on "The link Between Childhood Self-control and Adult Status Decades Later" is published in the Proceedings of the National Academy of Sciences.
2016年6月六级真题(第一套)听力 Section C
柯林斯高阶英汉双解学习词典释义
N-COUNT
诉讼
Legal proceedings are legal action taken against someone.