0 the number of people or things in a place when compared with the size of the place -- （人口等的）密度
1 the relationship between the mass of a substance and its size -- （物質的）密度
Lead has a high density. 鉛的密度大。
Aluminium is low in density. 鋁的密度小。
Generation of multiply charged ions at low and high laser-power densities.
All flies were reared in bottles at low larval densities.
Population densities were estimated every 3 d by means of a vertical tow.
There are, however, technical difficulties with using simulated tempering schemes, particularly with regard to setting up the modified densities and their pseudopriors.
From the equation of state the two number densities nuare also known.
Clutches used to found the 10 pair and control lines were culled randomly to keep larval densities equivalent in all lines.
The output was striking; most of the papers are highly technical - entropy functions and probability densities abound.
To match the empirical spectral densities, the magnitude of the variance of errors must represent more than 60% of the magnitude of the data variance.
