形容词
中文翻译：紧密的
同义词：
['solid', 'tight', 'firm']
例句：
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1. The bricks are so dense that they cannot be broken easily.
这些砖头非常密实，不容易被打破。
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2. The ground is so compact that it is difficult to dig a hole.
地面非常密实，很难挖一个洞。
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3. The fabric is so tightly woven that it keeps the shape well.
这种布料织得非常密实，保持形状良好。