| 51. | For several years his theory held the field. |
| 他的理论在好几年时间里保持着它的权威性。
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| 52. | This theory has no foundation in fact. |
| 这一理论没有事实根据。
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| 53. | The theory holds every water and is unassailable. |
| 这理论绝对站得住脚，是无懈可击的。
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| 54. | Conflict between theory and observation becomes overpowering. |
| 理论同观测的矛盾变得不可调和。
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| 55. | Most seed orchard theory is based on the assumption that panmixis will occur and that selfing will not be a serious problem. |
| 大多数关于种子园理论，是以假定能发生随机交配和自花受精而不会成为严重问题为依据的。
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| 56. | We may begin with an analysis exactly parallel to that of our utility theory . |
| 我们或许可从与我们的效用理论完全相似的分析开始。
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| 57. | Only an open-ended and continuously self-critical approach could avoid paralysis in the theory . |
| 只有一种无限制的、持续的自我批判方法才能避免理论中的瘫痪现象。
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| 58. | By my theory these allied species are descended from a common parent. |
| 根据我的学说，这些近缘的物种是由同一的祖先而来的。
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| 59. | The preceding chapter, for the most part, dealt with paraxial theory as applied to thin spherical lens systems. |
| 前一章讨论的基本上是应用于薄球面透镜系统的傍轴理论。
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| 60. | It was in 1905 that Albert Einstein, the greatest scientist of the 20th century, set forth the theory of relativity. |
| 是在1905年阿尔伯特·爱因斯坦，这位20世纪最伟大的科学家，提出了相对论。
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