EM specimen penetrator

例句：

1. 1. The electron microscope is a powerful tool for examining biological samples.
   电子显微镜是研究生物样本的强大工具。
2. 2. The EM specimen penetrator was used to analyze the chemical composition of the sample.
   使用电子显微镜标本穿透器分析了样品的化学成分。
3. 3. The EM specimen penetrator allowed us to observe the microscopic structure of the sample in detail.
   电子显微镜标本穿透器让我们能够详细观察样品的微观结构。