| 单词 | 中距离 |
| 释义 | 〔trifocal〕Having one section that corrects for distant vision, a second section that corrects for medium vision, and a third that corrects for near vision, as an eyeglass lens.远中近三用的:具有分别校正近距离视觉、中距离视觉和远距离视觉的三个部件的,如目镜透镜 |
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