When the art lesson started, Lucy couldn't understand the art teacher.

美术课开始时，露西听不懂美术老师说的话。

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When the art lesson finally ended, Lucy didn't dare to hand in her work.

美术课终于结束了，露西不敢交她的作品。

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Excuse me, could you please tell me what time you have your art lesson?

打扰一下，请告诉我你几点上美术课？

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The paintings hanging in these large rooms give a lesson in the history of art over hundreds of years.

VOA: special.2010.08.04

Banksy's art is a lesson in Economics 101.

FORBES: Banking On Banksy

Renewed inside and out, the new Judd Foundation is poised to give the art world and the general public fresh insight into a whole artistic era, as well as an object lesson in the nuanced dialogue between architecture and art, when it reopens its doors in June.

WSJ: Donald Judd's SoHo Haven

If there is one lesson to be learned from the autumn it is that there is still an art market, and you can't say that anymore about all markets.

ECONOMIST: Art.view: The incredible shrinking saleroom | The