interior focusing lens

例句：

1. 1.The camera has an internal focusing lens that allows you to adjust the focus manually.
   相机有一个内部聚焦透镜，可以让你手动调整焦点。
2. 2.The scientist used an internal focusing lens to capture the image of the distant star.
   科学家使用了一个内部聚焦透镜来捕捉远处恒星的图像。
3. 3. The microscope has a small internal focusing lens that magnifies the sample for better observation.
   显微镜有一个小型的内部聚焦透镜，可以放大样本以便更好的观察。