形容词
中文翻译：平坦的
同义词：
['smooth', 'level', 'flat', 'even']
例句：
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1. The road is very smooth and easy to drive on.
这条路非常平滑，驾驶起来很容易。
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2. The floor of the room is level, so it's easy to clean.
房间的地板是水平的，所以很容易打扫。
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3. The table is very flat, so it's easy to write on.
桌子很平，所以很容易写字。