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51. | Marginal benefit |
| 边际效益 |
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52. | benefit entitlement |
| 利益享有权 |
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53. | invalidity benefit |
| 残废津贴 |
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54. | differential benefit |
| 差量效益 |
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55. | equitable benefit |
| 公平利益 |
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56. | indeterminate benefit |
| 无法确定受益程度 |
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57. | constant benefit |
| 不变效益 |
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58. | benefit concert |
| 慈善音乐会 |
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59. | gratuity benefit |
| 酬金福利 |
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60. | benefit evaluation |
| 受益估测 |
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