The art career of Marcel Duchamp is an entrance which we understands Duchamp, and also a jumping-off point which the text discuss Duchamp from advocating art to opposing art.

杜尚的艺术生涯是我们了解杜尚的一个入口，也是本论文在后面论述杜尚从艺术走向反艺术的过程中一个起点。

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Where to draw the line between the two opposing views each time is the art of management, and also a test of judgment.

每次在两个对立观点之间的何处划线，都是一种管理艺术，也是对判断力的考验。

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Nonetheless, it is worth reading for its fascinating discussion of the two painters' opposing approaches to their art.

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And central defenders spoiled by years of blanket protection, have lost the art of defending when left one-on-one against opposing strikers.

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These three made the art of the blocked shot look common and changed the way the opposing offensive was run.

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