示踪材料 meaning in English

tracer material

The area of sediment outflow caused by piping was obtained by photo reproduction , and the local cross - sections of samples after the occurrence of piping were observed and measured with colored sediment taken as tracers
利用拍照还原等方式，得到管涌口出砂面积；并采用彩色砂作为示踪材料，切片观察测量管涌发生后试样的局部剖面。
In the need of adulterating target materials with metal clusters as tracing materials , we calculated the cluster behavior of al materials in theory . the preliminary study was carried out in no more than 7 atoms , considering the much time in calculation and limitation of theory model gaussian98 program , the b3lyp method and the 6 - 311 + g * basis function were used in the calculation
由于靶材料掺入金属团簇示踪材料的需要，我们对铝材料的团簇行为进行了理论计算，考虑到计算量和理论模型的缺陷，初步研究是在7个原子以内进行的。