As the shrinkage and corresponding increase of density proceed, the planetary spheroid becomes more and more elliptic, and the succession of forms constitutes a family classified according to the density of the liquid. The specific mark of this family is the flattening or ellipticity.英文原著 · 《Darwin and Modern Science》
It would be absurd to suppose that these stars can be uniform in density throughout, and from all that is known of celestial bodies it is probable that they are gaseous in their external parts with great condensation towards their centres. This conclusion is confirmed by arguments drawn from the theory of rotating masses of liquid. (See J.H. Jeans, "On the density of Algol variables", "Astrophysical Journ." Vol. (1905), page 97.)英文原著 · 《Darwin and Modern Science》
The average density of the rural population in white areas is about five to eight persons per square mile. In native areas the average is ten times that number, while the black belt along the Indian Ocean contains from 100 to 140 Natives per square mile (see Schedule F. and Tables XIII-XVI, of the Census Report). Yet the Commission would saddle these congested native areas with additional populations from the Colony Proper and raise the density to something over 200 souls per square mile.英文原著 · 《Native Life in South Africa》
Transparent bodies differ in their power of bending light-- as a general rule, the refractive power is proportioned to the density--but the chemical constitution of bodies as well as their density, is found to effect their refracting power. Inflamable bodies possess this power to a great degree.英文原著 · 《The History and Practice of the Art of Photography》
In these northern counties the industrial population is double or treble the agricultural. The fertile western counties of Pembroke and Anglesey come between the industrial and grazing counties in density of population.英文原著 · 《A Short History of Wales》
The density of solid iodine is 4.95; that of its vapor 8.716. It greatly resembles chlorine and bromine in its combinations, but its affinities are weaker. It does not destroy the majority of organic substances, and vegetable colors generally resist its action. It combines with several organic substances, imparting to them peculiar colors. It colors the skin brown, but the stain soon disappears.英文原著 · 《American Hand Book of the Daguerreotype》
Me, too. That was the density theory I thought really worked.美剧 · 《Modern Family》
I can't get it, uh, rezoned to increase the density, so now it's a liability,美剧 · 《Shameless》
Which suggests either a remarkable passivity among the, I assume, 24 to 36 residents of this building, Based on the number of mailboxes And given typical urban population density Or a shared delusion of functionality.美剧 · 《The Big Bang Theory》
The surface tension, density, etc., and then you press "execute," the surface tension, density, etc., and then you press "execute,"演讲 · 《Everyday inventions ~ Saul Griffith》