focused spot diameter

例句：

1. 1. The engineer measured the focused spot diameter of the microscope to ensure it was accurate.
   工程师测量显微镜的聚焦点直径，以确保其准确无误。
2. 2.The research team found that the focused spot diameter of the laser was too small for the sample preparation.
   研究团队发现激光的聚焦点直径太小，不适合样品制备。
3. 3. The scientist used a focused spot diameter of 0.5 micrometers to achieve the best results in his experiment.
   科学家使用0.5微米的聚焦点直径，以获得实验的最佳结果。