放大 (fàng dà): to enlarge, to magnify

This photo is too small. Can you help me enlarge it to twice its original size? I want to print it out and hang it on the wall.

The teacher enlarged the diagram of the cell structure with the projector so that even the students in the last row could see it clearly.

This shop can help you enlarge old photos and frame them; the cost depends on the size.

When observing with a microscope, we need to magnify the sample several hundred times to see the bacteria inside.