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复数形式
densities
1
密度, 体积密度
(physics) the degree to which a substance is compacted, measured by dividing its mass by its volume
- The density of water is approximately 1 gram per cubic centimeter (g/cm³).
水的密度约为每立方厘米1克（g/cm³）。
- Air has a much lower density compared to water, which is why objects float in water but fall through air.
与水相比，空气的密度要低得多，这就是为什么物体在水中漂浮但在空气中下落。
- The density of a material can affect its physical properties, such as its strength and buoyancy.
材料的密度会影响其物理特性，例如强度和浮力。
- The concept of density is important in geophysics for understanding the composition and structure of Earth's interior.
密度的概念在地球物理学中对于理解地球内部的组成和结构非常重要。
- To determine the density of an object, you divide its mass by its volume.
要确定物体的密度，您将其质量除以其体积。
同义词：
2
密度, 集中度
the spatial property of having elements packed closely together, typically expressed as the number of units per given area or volume
- Urban planners analyze population density to determine where to build new transit lines.
城市规划者分析人口密度以确定在哪里建设新的交通线路。
- The forest survey measured tree density at 550 specimens per hectare.
森林调查测量了树木的密度为每公顷550株。
- High seating density in the theater made it difficult for latecomers to find open spots.
剧院里座位的高密度使迟到者难以找到空位。
- Engineers consider traffic density on highways when designing lane width and signage.
工程师在设计车道宽度和标志时考虑高速公路上的交通密度。
- The aquarium monitor showed fish density rising so sharply that filtration rates had to increase.
水族箱监视器显示鱼的密度急剧上升，以至于过滤速率不得不增加。
反义词：
3
the degree to which light is blocked or absorbed by a photographic filter or film, usually measured in stops or optical density units
In photography, density refers to the degree of light and dark in an image or a photographic print. It describes how much light is absorbed or blocked by the film or paper, affecting the image's contrast and tonal range. Higher density areas appear darker because they have more light absorption, while lower density areas are lighter. Managing density is important for achieving the desired exposure and contrast in photos, ensuring that details are visible and well-balanced throughout the image.
- The photographer adjusted the filter density to reduce glare.
- The technician calibrated the density of the photographic plate.
- The optical density of the lens coating affects image contrast.
- She measured the density of the filter before the shoot.
- Lowering the density allowed more light to reach the film.