It has one of the highest densities of elephants in the world .

营地也是世界上象群密度最高的地方之一。

The two opposing tides in this place can not merge because they have different densities .

可是这个地方的两种对立的潮汐能不能合并，因为它们有着不同的密度。

Vegetation lineaments are natural lines of vegetation or boundaries between high and low vegetation densities .

植被的轮廓线是植被的天然纹路，或者是在高密度植被和低密度植被之间的边界。

Knowing this boundary would help scientists understand the behavior of matter when it is scrunched to extraordinarily high densities .

了解这一界限将会有助于科学家们弄明白当物质被挤压成极高密度时所表现出的特性。

Oxygen densities in both buildings were about 21 % , high enough for workers to enter the buildings , the firm said .

两座建筑的氧气密度都在大约21%，足够让工人进入建筑，这家公司如是说。