The zero point of the density scale is defined by having no specimen in the densitometer.定义密度计内设有样品时的密度为密度尺标的零点.Once again, illustrators exposure sites in order to achieve the optical density at least version 4.00.再不主, 不...
the density of a gas一种气体的密度Mercury has a much greater density than water.水银的密度比水大得多.Astronomers know that Pluto and Triton have nearly the same size, mass, and density.天文学家知道冥王星与海卫一拥有几乎相同的体积、质量与密度。...
输卵管连接着卵巢和子宫。The fallopian tubes connect the ovaries with the uterus.胎儿在子宫内的发育a baby's development in the womb当受精卵植入子宫壁时，妊娠就开始了。Pregnancy begins when the fertilized egg is implanted in the wall of the uterus....