The focus of libraries' work varies with different timebackground of each stage.
每个阶段的时代背景不同，图书馆工作的重心也不一样。
2
Based on the analysis of the timebackground of green trade barrier, the author discusses the impact on the export of agricultural products in China.
本文在分析绿色贸易壁垒产生的时代背景的基础上，讨论了绿色贸易壁垒对我国农产品的影响。
3
Emphasize to inquiry into the figure, symbol to the notional influence in design in art in modern television, and application under the new space-timebackground.