名词
中文翻译：Unknown
同义词：
['rough draft', 'quick sketch', 'rough outline']
例句：
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1. The artist drew a thumbnail sketch of the scene before moving on to the main painting.
艺术家在开始主要画作之前，画了一幅场景的草图。
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2. She quickly drew a thumbnail sketch of her new friend's room.
她迅速画了一张新朋友房间的草图。
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3. The designer made a thumbnail sketch for the new product before deciding on a final design.
设计师为新产品制作了一个初步的草图，然后决定最终的设计。