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41. | ion compensation |
| 衰减补偿 |
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42. | attenuation by absorption |
| 吸收衰减 |
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43. | attenuation stability |
| 衰减稳定性 |
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44. | evanescent mode |
| 衰减模式 |
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45. | attenuation frequency characteristic |
| 衰减频率特性 |
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46. | space attenuation |
| 空间衰减 |
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47. | wave attenuation |
| 波衰减 |
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48. | brightness decay |
| 亮度衰减 |
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49. | shadow attenuation |
| 阴影衰减 |
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50. | range of attenuation |
| 衰减范围 |
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