形容词
中文翻译：平坦的
同义词：
['straight', 'level', 'flat-bottomed']
例句：
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1. The road is flat and easy to drive on.
这条路平坦且易于驾驶。
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2. The table is flat enough for a group of people to sit around it.
这张桌子足够平，可以供一群人围坐。
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3. The floor is flat and smooth, making it easy to clean.
地板平坦且光滑，便于清洁。