| 21. | Two can indeed easily be explained as first overtones (see Table 115) which occur strongly because of Fermi resonance. |
| 另外两条的确很容易解释为第一泛频（参看表115），它们的强度由于费密共振而增强。
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| 22. | The time at which the two reductive divisions occur is not necessarily coincident to the time of ovulation. |
| 两次减数分裂的时间不一定与排卵时间相一致。
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| 23. | Most galaxies occur in pairs or in small multiple groups. |
| 大多数星系成双或几个成一小群。
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| 24. | 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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| 25. | Parasitic and nonparasitic cysts rarely occur in the spleen. |
| 寄生虫性和非寄生虫性囊肿在脾脏很少发生。
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| 26. | Our estimate was that it would not occur for the better part of a year. |
| 我们估计在大半年内它不会出现。
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| 27. | When that recovery did not occur farm leaders moved further along the road toward advanced governmental participation. |
| 当那种恢复没有成为事实时，农业界领导人就进一步要求政府干涉。
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| 28. | Additional social stresses may also occur because of the population explosion or problems arising from mass migration movements-themselves made relatively easy nowadays by modern means of transport. |
| 由于人口的猛增或大量人口流动（现代交通工具使这种流动相对容易）引发的种种问题也会对社会造成新的压力。
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| 29. | The benefit didn't occur until. |
| 这种好处直到…才出现。
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| 30. | The notion that he would be angry did not occur to me. |
| 我没料想到他会发怒。
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