密度

• The density goes down exponentially with height .
  分子密度随着高度的上升而指数衰减。
• The drag force decreases as the air density decreases .
  当空气密度减小时阻力也减小。
• Beds of less than normal density are slightly uplifted .
  低于平均密度的地面微微隆起。
• By the charge density we mean the per unit volume .
  所谓的电荷密度是指单位体积的电荷。
• The strain energy density function equals the helmholtz .
  应变能密度函数等于亥姆霍兹函数。
• A low population is not sufficient to halt a decline .
  低的种群密度不足以立即阻止种群下降。
• Reflectivity depends on the velocity and density of rocks .
  反射能力取决于岩面的速度和密度。
• The density p is that of the fluid escaping from the orifice .
  上式中P是从小孔喷出的流体密度。
• High packing density greatly impedes the cooling of the array .
  高存贮密度很不利于阵列的散热。
• The track density is 48 tpi and the number of tracks is 77 .
  磁道密度是48道英寸，磁道数是77。