1·It seems the reproductive system of man's best friend is one of the mysteries of modern science.
人类最好的朋友的生殖系统似乎是现代科学的一个未解之谜。
2·If the group faces food scarcity, individuals in the group will reach reproductive maturity later than otherwise.
如果这个群体面临食物短缺的困难，那么这个群体中的个体将比其他群体更晚达到生殖成熟。
3·It is thought that being overweight may also increase the risk of cancer in the reproductive organs for women and in the prostate gland for men.
人们认为，超重还可能增加女性生殖器官和男性前列腺患癌的风险。
4·The ancestors of plants were photosynthetic single-celled organisms that gave rise to plants presumably lacked true roots, stems, leaves, and complex reproductive structures such as flowers.
植物的祖先是进行光合作用的单细胞生物，由此产生的植物可能缺乏真正的根、茎、叶和复杂的生殖结构，如花朵。
5·Postzygotic reproductive isolation occurs by the inviability of the hybrid offspring.
合子后生殖分离是由杂种后代的无性繁殖而引起的。
1·Reports have it that both the United States and the United Nations are endorsing the reproductive health bill.
报道称美国和英国都支持再生的健康账单。
2·Unlike sunlight, water and wind, fossil energy resources , including coal, oil and gas, are not practically reproductive during human history.
不像阳光、水和风，化石能源资源，包括煤、石油和天然气，在人类历史上其实都不是可再生的。
3·Once you attain full consciousness, the reproductive phases of your existence will utilize your new twelve-strand genes.
一旦你们获得全意识，你们存在的再生阶段将会利用你们新的十二条基因。
4·If you increase nitrogen you are changing the environment and in such a sensitive environment like coral reefs it is mainly affecting the reproductive system of corals.
如果氮的含量增加，珊瑚生长的环境就改变了。在珊瑚礁这样敏感的环境中，珊瑚的再生系统会受到很大的影响。
5·A two-strain SIR epidemic model is discussed and an explicit formula for the basic reproductive number is derived by analyzing the local stability of the trivial equilibrium.
讨论了一类由两种不同病毒导致的SIR流行病模型，分析了平凡平衡点的局部稳定性，得到了基本再生数的数学表达式；