| 1. | They concentrated on better definition of the optical image. |
| 他们致力于提高该光学影像的鲜明度。
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| 2. | A mirage is an optical illusion. |
| 海市蜃楼是一种视错觉。
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| 3. | I thought I saw a ghost but it was just an optical illusion. |
| 我以为我看见鬼了，其实只是一种幻觉。
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| 4. | Optical depth and optical path are often confused in the literature. |
| 文献中光学厚度和光程时常混淆。
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| 5. | It was an ( optical ) illusion caused by the weak lights. |
| 这是由微弱的灯光引起的（视）错觉。
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| 6. | optical effects and sound effects |
| 视觉效果与声音效果
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| 7. | an optical [visual] angle |
| 视角
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| 8. | optical character recognition |
| （计）光符号识别
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| 9. | an optical microscope |
| 光学显微镜
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| 10. | the optical measurement of distance |
| 光学测距
|