1.
'They used to live to around the age of 50, so that was not a great problem. But now they are being killed off before they can reach even half that age.
他们通常的寿命有50年，但现在他们还没到繁殖年龄的一半就已经被杀死了。
2.
Age, Growth and Reproduction of the Roach Rutilus Rutilus (Linnaeus, 1758) in Ulungur Lake, Xinjiang, China
新疆乌伦古湖拟鲤的年龄、生长与繁殖
3.
Studies on the Age, Growth and Reproductive Biology of Xenocyprinae Microlepis
细鳞鲴的年龄、生长和繁殖生物学研究
4.
Studies on the Age and Growth、Reproduce Biology of Xenophysogobio Boulengeri Tchang;
异鳔鳅鮀的年龄与生长、繁殖生物学研究
5.
Age-structure and reproduction investigation on Niviventer confucianus living on islands at Qiandao Lake in autumn
千岛湖秋季社鼠种群年龄结构及繁殖状况初探
6.
Studies on the Age, Growth and Reproductive Biology of Culter Alburnus in Xujiahe Reservoir
徐家河水库翘嘴鲌年龄与生长和繁殖生物学研究
7.
On Reproduction of Nipponia nippon From 1981 to 2000;
1981—2000年朱鹮的繁殖状况
8.
Studies on Age, Growth and Fecundity of Schizopygopsis Malacanthus Baoxingensis and the Fish Diversity in the East and West Rivers in Baoxing County;
宝兴裸裂尻鱼的年龄、生长和繁殖力研究及宝兴东、西河的鱼类多样性
9.
The breeding herds annually produce and sell a crop of calves.
繁殖牛场每年生产和售出大批犊牛。
10.
Tissue Culture and Rapid Propagation of Dieffenbachia camilla
玛利安万年青的组织培养和快速繁殖
11.
Production of offspring or young.
生育，繁殖后代或年轻（一代）的产生
12.
Popu|ation size:Approximately 600 boars in 1983.
数量:1983年调查有繁殖母猪600余头。
13.
Reproductive Performance and Utility Duration of Charolais Bull
夏洛来公牛繁殖性能及利用年限观察
14.
Shoot apex culture and rapid propagation of Dieffenbachia Tropic Marianne
玛丽安万年青的茎尖培养与快速繁殖
15.
Age-related Epstein-Barr virus-associated B-cell lymphoproliferative disorders:Special references to lymphomas surrounding this newly recognized clinicopathologic disease
年龄相关的EBV-B细胞淋巴增殖性疾病
16.
This makes it necessary to allow gilts to reach a higher age and weight before expecting them to breed successfully.
因此，为了达到良好的繁殖性能，就应该延缓后备母猪的初配日龄。
17.
Correlation Analysis of Breeding Traits Affecting the Litter Weight of New Line Duroc Pigs at 60-day-old
影响杜洛克猪新品系60日龄窝重繁殖性状因素的相关性分析
18.
Giant pandas reach breeding maturity between four and eight years of age.
在4和8岁之间，大熊猫开始进入繁殖的成年期。