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- negative density difference 负密度差
- According to oil/water density difference ,reasons for nonconsistent response of GFC water holdup meters are presented. 依据油水分离原理，分析了GFC型持水率计产生非一致性响应的原因。
- The reasons forming abnormal formation pressure mainly includes digenesis, thermogenesis, biochemical action, tectonic action, dialysis, and fluid density difference action. 形成异常地层压力的原因主要有成岩作用、热力作用、生化作用、构造作用、渗析及流体密度差异作用等。
- Further qualifications require that the two fluids be miscible and that the density difference be a function of differences in temperature. 另外的条件要求两种流体可以掺混起来，并要求两种流体的密度差是温度差。
- In order to study core displacement,a CT(Computerized Tomography) measuring way of density difference which expresses the porosity distribution of oil core is presented. The measurements in reality show that the results are satisfactory. 为进行石油岩芯驱替机理的深入研究，应用工业CT技术，提出了一种石油岩芯孔隙度及分布CT密度差测量法，并进行了实际测量。
- According to condensed water and steam density difference,the valve automatically rise or fall along with the change of water level,opev or close the valve hole through lever driving valve core . 该阀根据凝结水和蒸汽的密度差，浮球随阀腔内水位的变化而自动升降，通过杠杆带动柱面阀芯开启或关闭阀孔。
- The research demonstrated that when waters are by 2 either 3 salinity or the density different water level constitutions, will present the stagnant water phenomenon. 研究显示，当一个水域是由2或3层盐度或密度不同的水层构成时，就会出现死水现象。
- The effect of interface undulations on the geoid in China and its adjacent regions is calculated on the basis of the average density differences of the interfaces in this paper. 结合中国及邻区的数据,利用界面上下的平均密度差,计算了物质界面起伏对大地水准面的影响,发现莫霍界面的影响占地形质量影响的70%25左右,验证了均衡补偿理论。
- The answer to my request was in the negative. 对我的请求的答复是否定的。
- A new rule of ordering river entities based on counting the amount of their tributaries is proposed, which indicated the density differences of river entities among different areas. 设计一种结合河流等级、长度与所在层次的综合指标进行河流选取；
- His answer to my request was a negative. 我的请求遭到了他的拒绝。
- The tests for hepatitis were negative. 肝炎检查结果是阴性。
- Density difference liquid membrane separation technology 重差分相液膜分离技术
- Their criticism was not negative. 他们的批评并不是负面的。
- Do a blow-up of this corner of the negative. (对某事的)详尽的报道。
- I have a negative opinion on the value of this idea. 我对这个主意持反对意见。
- The density of population in this city is very high. 这个城市的人口密度非常高。
- How many copies do you ask us to print off from the negative? ＂用那张底片，你要我们印几张像片？＂
- A way of producing the negative of a number by obtaining its complement. 一种通过求一个数的补码来得到该数的负数的方法。
