形容词
中文翻译：Unknown
同义词：
['abstract', 'generalized', 'non-specific', 'non-figurative', 'non-pictorial']
例句：
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1. The concept of time is abstract and difficult to define.
时间的概念是抽象的，难以定义。
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2. He drew a picture of the sun in his notebook, which is an abstract representation of the sun.
他在笔记本上画了一幅太阳的图画，这是对太阳的一种抽象表示。
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3. The artist created a collection of abstract paintings that conveyed emotions through color and form.
这位艺术家创作了一系列抽象画作，通过色彩和形式传达情感。