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| 1. | They looked at one sex only to avoid differences in life span between sexes. |
| 为了避免性别上的差异，此项研究仅在男性中开展。参加此项研究的总人数原为528人，但由于战争和其他非自然原因，其中有四人已经去世。 |
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| 2. | The paper discussed proportion between side span and middle span in three spans prestressed continuous |
| 本文对三跨预应力连续箱梁桥的边跨与中跨比例问题进行了初步的探讨。 |
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| 3. | The span between two such diaphragm walls can easily be bridged with precast reinforced concrete beams |
| 使用预制钢筋混凝土梁或者现浇钢筋混凝土板会很容易将两侧地下连续墙的跨度空间连接起来,从而完成隧道的主壳。 |
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| 4. | During the later half of the 20th century, the gap of the average life span between yenders(male and |
| 在 2 0世纪下半叶不少发达国家和地区分性别的人口平均预期寿命的差距在拉大 ,但并非必然趋势 ; |
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