1. tall California pine with long needles in bunches of 3, a dense crown, and dark brown deeply fissured bark. 
   加州一种高大的松树，三针一束长针叶，深裂纹黑褐色树皮。
2. tall spruce with blue-green needles and dense conic crown; older trees become columnar with lower branches sweeping downward. 
   一种高大的云杉，蓝绿色针叶和茂密的圆锥形球果；年长的树种呈柱形，低矮的枝条大面积下垂。
3. Dense glass; a dense fog. 
   毛玻璃；浓雾
4. dense fluid physical mechanics 
   稠密流体物理力学
5. Chimneys exhaling dense smoke. 
   烟囱中冒出浓烟

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