It was his friend MarcelDuchamp who made him realise this.
正是他的朋友马塞尔·杜尚使他领悟到了这一点。
2
A few years later, MarcelDuchamp asserted that a urinal was art.
数年之后，Marcel Duchamp宣称尿壶也是艺术。
3
The art career of MarcelDuchamp is an entrance which we understands Duchamp, and also a jumping-off point which the text discuss Duchamp from advocating art to opposing art.