ultramicroanalysis

例句：

1. 1.Ultramicro analysis is a technique used to study the structure of very small objects.
   超微分析是一种用于研究非常小物体结构的技术。
2. 2. The ultramicro analysis of the sample revealed that it contained trace amounts of mercury.
   对样本的超微分析显示它含有微量的汞。
3. 3.The research team conducted an ultramicro analysis of the samples to determine their composition.
   研究团队进行了超微分析，以确定样品的成分。