- He focuses the lens of a microscope.
他调整显微镜的透镜以定焦点。
- A lens is an optical system including two refracting surfaces.
一个透镜是包含两个折射面的光学系统。
- Both teams used a high-resolution ion microprobe and a mass spectrometer to analyze the crystals.
两研究小组都用了高清晰度离子探针和一组分光计来分析水晶。
- Photometric Standards for Absorbance are used to check the accuracy of spectrometer systems.
吸光光度计标准用于检查分光计系统的精确性。
