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数学的研究对科学的发展就像空气或水一样。
无产阶级运动是广大多数人的自觉、独立的运动,是为了广大多数人的利益。
The work of an advertising agency is warmly and immediately human. It deals with human needs, wants, dreams and hopes.
Efficiency in farming shouldn’t come at the cost of biodiversity.