这幅令人震惊的18米长卷，描绘了世界上最著名的城市（纽约）轮廓画，这是孤独症艺术家斯蒂芬。维特夏经过20分钟直升飞机的全景鸟瞰后绘就的。

This astonishing 18ft drawing of the world's most famous skyline was created by autistic artist Stephen Wiltshire after he spent just 20 minutes in a helicopter gazing at the panorama.

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先画个轮廓，再画细部。

Draw an outline before you fill in the details.

《新英汉大辞典》

画完轮廓后，你就可以画阴影了。

After drawing the shape, you can shade in.

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