microdensitometry

例句：

1. 1. This method is used to measure the density of materials at very small scales.
   这种方法用于测量材料在非常小尺度上的密度。
2. 2. Microdensitometry is a powerful tool for studying the properties of nanomaterials.
   微密度测定法是研究纳米材料性质的一种有力工具。
3. 3. In microdensitometry, the sample is placed on a stage and illuminated with abeam of light.
   在微密度测定法中，样品被放置在一个平台上，并用一束光照射。