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area with low density chromium 贫铬区
Hemorrhagic infarcts of forehead and parietal lobe were fanlike or irregular and low density area with mottling high density. 出血性梗塞多位于额、顶叶，表现为扇形或不规则低密度区内出现斑点状高密度，有明显占位表现。
A porous abio-carrier with low density was developed and used in a Moving Bed Biofilm Reactor(MBBR) in this experiment. 开发了一种多孔轻质无机载体并将其应用于紊动床生物膜反应器,探讨应用该载体的紊动床生物膜反应器及生物膜特性。
The area with the higher than altitude adolescent of the region with low height above sea level is tall. 海拔低的地区的青少年比海拔高的地区为高。
area with low population density 低人口密度区
The species will disappear mainly in the area with lower altitudes from 180 to 1200 m above the sea level. 油松分布面积的减少，主要发生在海拔180－200m的地区。
The majority of the gold appeared to be fine, or associated with low density gangue as only 33% of the gold reported to a gravity concentrate which contained 8% of the mass. 大多数的金呈细粒出现;或与低密度的脉石连结;在含有8%25的岩体的一个重力精矿中;仅仅只有33%25的含金值被批露.
Nyingchi, an area with lower altitude and moist weather, has plentiful rainforests and vast farmlands. 林芝地区由于相对海拔较低，气候湿润，长有大片茂密的原始森林，农田得以开垦。
Definition of adrenal myelolipoma by CT was based on a well circumscribed nonhomogeneous mass with low density mature fat interspersed with more dense myeloid tissue. 方法回顾性分析12例肾上腺髓质脂肪瘤患者的临床资料并复习有关文献。
Magnetic nanoparticles with low density lipoprotein delivery system: 0.026 mg/ml of LDL and 0.120 mg/ml of nude Fe_2O_3 was relatively appropriate. 将低密度脂蛋白(LDL)作为Fe2O3磁性纳米颗粒的纳米传输系统:浓度为0.;026 mg/ml的LDL与0
Carbon aerogels with low density and well-developcd nano-seale porous structure are a speeial class of carbonaceous non - erystalline materials. 炭气凝胶是一种轻质，多孔，纳米级非晶炭材料，其比表面积大，导电性好，机械性能优异。
The CT features of Xanthogranulomatous pyelonephritis(XGP)include multiple,rounded,low density areas with enhancing rings arranged in a hydronephrotic pattern known as bear paw sign. 黄色肉芽肿性肾盂肾炎(XGP)的特征是CT示群集的类圆形的低密度区以及环形增强带形成“熊掌征”；
We can compute the circular area with radius. 我们能用半径计算出圆的面积。
Daqing oil field development is gradually turning to the periphery area with low reserves and difficult exploitation at present. 目前,大庆油田开发逐渐转向储量丰度低、开发难度大的外围油区。
Methacylic acid / acrylonitrile copolymer (MAA/AN) foam with low density,high strength,high rigidity and high heat-resistance is prepared via the means of in-situ cyclization. 通过“原位成环”法制备了一种低密度、高强度、高刚性和高耐热性的(甲基丙烯酸/丙烯腈)共聚物(MAA/AN)泡沫塑料。
The results showed the DNA extraction kit could obtain high purity genomic DNA with low density, and high concentration, good quality and relatively low cost by Phe/Chl method. 总的来看，试剂盒法提取的DNA纯度较好，但是浓度低，而苯酚法得到的DNA浓度高，质量好，且相对成本低。
The war impacted the area with refugees. 战争使那个地区挤满难民。
Thoracic X-ray of 61.5% patients showed typical image, with low density tuberous and globular nidus in the cavity surrounded with semicircle or crescent vacuoles. 61.;5%25患者显示较典型的X线征像，表现为空洞内低密度结节状或球形病灶，围以半环形气带或新月形气腔；
The majority of the gold appeared to be fine, or associated with low density gangue as only33% of the gold reported to a gravity concentrate which contained8% of the mass. 大多数的金呈细粒出现;或与低密度的脉石连结;在含有8%25岩体的一个重力精矿中;仅仅只有33%25含金值被批露.
Optical-path-difference of propagated distorted wavefront is computed.It is confirmed that transform of beam wavefront is accelerated as beam passing through the vortex with low density. 计算受干扰波阵面的光程差以及抖动角，确定通过涡的低密度区后会加速波阵面的变形，单体涡对光束有散焦作用。