| 1 | The lenses for giant telescopes are very expensive to grind. | |
| 2 | His daily work is to rough out the lenses for cameras. | |
| 3 | Paper is made of wood, and it will scratch your lenses. | |
| 4 | Paper is made of wood, and it will scratch your lenses. | |
| 5 | He was wearing dark frames with air where the lenses normally go. |
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