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51. | expectancy life |
| 概率寿命 |
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52. | lifetime killer |
| 降低寿命的因数||寿命抑制因数 |
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53. | shorten the skirt; shorten the rope by a few inches. |
| 把裙子缩短;把绳了缩短几寸。 |
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54. | life conservation |
| 寿命维护 |
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55. | Operating life |
| 工作寿命 |
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56. | service life of internal combustion engine |
| 内燃机寿命 |
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57. | radioactive life |
| 放射性寿命 |
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58. | insulation life |
| 保温层寿命 |
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59. | catalyst life |
| 催化剂寿命 |
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60. | lifetime of product |
| 产品寿命 |
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