您要查找的是不是：
- radiographic density X线照相密度, X线片密度, 放射线摄片黑度
- radiographic density difference X线摄影密度差
- The density of population in this city is very high. 这个城市的人口密度非常高。
- The area had a population density of five people per square mile. 该地区人口密度为每平方英里五人。
- The density goes down exponentially with height. 分子密度随着高度的上升而指数衰减。
- The population density is evened out. 种群密度亦趋于均匀化。
- Density exceeded 100 nests per mile. 丝巢密度超过每英里100巢。
- Such areas appear as "hot spots" on radiographic scans. 该区域的放射摄影扫描显现为“热点”。
- Do you know the density of population in this area? 你知道这个地区的人口密度吗?
- A radiograph of a vein after injection of a radiopaque substance. 静脉造影一种静脉的放射线照片，在注入射线不能显著穿透的物质后拍摄
- This wave of excess density is sound. 这种过剩密度的波就是声波。
- The density logger consists of a radiation source. 密度测井仪包括辐射源。
- Methods Investigating the rodent density by ELTON. 方法用ELTON夹夜法对鼠密度进行调查。
- Radiographic examination of aluminium and magnesium alloy castings. 铝及镁合金铸件的射线照相检验。
- 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。
- Let us go to the laboratory to check the radiographic films. 请到试验室去检查透视片子。
- The entropy density is constant ahead of the shock. 冲击波前方的熵密度是恒定的。
- The driver had to stop because the density of the fog made it difficult to see. 由於浓雾使道路很难看清,司机不得不停车。
- Study Design: This is a prospectie radiographic cohort study. 研究设计：该研究是一项前瞻性放射学队列研究。
- Qualification of radiographic filn digitisation systens. 参考名称: Non-destructipe testing.
