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41. | spark suppression |
| 火花抑制 |
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42. | condenser spark |
| 电容火花 |
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43. | Spark Program |
| "星火计划"(把先进、适用的技术引向农村的指导性科技计划,1986年经国务院批准) |
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44. | A spark gap. |
| 火花隙 |
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45. | spark extinguisher |
| 灭火花器 |
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46. | spark sintering |
| 放电烧结 |
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47. | spark frequency |
| 火花频率 |
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48. | a spark of interest; a spark of decency. |
| 我们试着他的聪明才智。 |
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49. | spark photography |
| 闪光照像 |
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50. | electric spark drill |
| 电火花钻井 |
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