magnification control

例句：

1. 1.The magnification control in the microscope is crucial for accurate measurements.
   显微镜中的放大控制对于精确测量至关重要。
2. 2. The engineer used a magnification control to adjust the focus of the camera lens.
   工程师使用放大控制来调整相机镜头的焦点。
3. 3. The magnification control allows us to see objects up close without distortion.
   放大控制使我们能够近距离观察物体而不产生失真。