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11. | Electrostatic focus |
| 静电聚焦 |
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12. | Focus length |
| 焦点长度 |
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13. | Magnetic focus |
| 磁聚焦 |
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14. | tangential focus |
| 切向焦点 |
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15. | focus onstage |
| 舞台交点 |
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16. | meridional focus |
| 子午焦点 |
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17. | equivalent focus |
| 等价焦点 |
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18. | focus group |
| 重点群体 |
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19. | aerodynamic focus |
| 气动力学焦点 |
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20. | focus [earthquake] |
| 震源〔地震〕 |
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