umbrella article

例句：

1. 1. The umbrella article in the book is very insightful.
   书中的雨伞文章非常有见地。
2. 2. This umbrella article discusses the importance of environmental protection.
   这篇文章讨论了环境保护的重要性。
3. 3. The author's umbrella article was published in the magazine last month.
   作者的雨伞文章上个月在杂志上发表。