它通常有关于科学时事的文章和故事，也有关于研究新进展的论文。
It usually has articles and stories about current affairs about science, as well as papers about new developments in research.
评论文章荟萃了发表于各大专栏文章的精华。
Reviews are distilled from articles previously published in the main column.
里奇女士将就美国社会和文化每周写两篇评论文章。
Ms. Rich will be writing a twice-weekly commentary on American society and culture.
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