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51. | space radiobiology |
| 宇宙辐射生物学 |
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52. | closed universe |
| 闭宇宙 |
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53. | singularity of universe |
| 宇宙奇点 |
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54. | static universe |
| 静止宇宙 |
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55. | finite universe |
| 有限宇宙 |
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56. | space metallurgy |
| 宇宙冶金 |
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57. | isotropic universe |
| 各向同性宇宙 |
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58. | newton universe |
| 牛顿宇宙 |
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59. | interstellar disturbance |
| 宇宙干扰 |
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60. | cosmic alpha particle |
| 宇宙α粒子 |
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