您要查找的是不是：
- age at first childbearing 初育年龄
- The rate of early marriage for women has come down and their average age at first marriage has gone up. 妇女早婚比例下降，平均初婚年龄提高。
- This is a bar graph of the average age at first marriage of both men and women in the U.S. 这是美国男性和女性的初婚平均年龄柱状图。
- In 1970,women's average age at first marriage was 20.2 years,while in 1993 it was 22.67 years,up 2.47 years. 1970年，妇女平均初婚年龄为20.;2岁；1993年为22
- At the same time,men's age at first marriage also dropped to the lowest point,younger than 23 years old. 同时，男性的初婚年龄也降到最低点，低于23岁。
- The average age at first marriage in the USA has been inching upward; it's now 26 for women and 27 for men. 目前,美国人首次结婚的平均年龄正慢慢上升,现在女性的首次结婚年龄为26岁,而男性为27岁。
- At the same time, men's age at first marriage also dropped to the lowest point, younger than 23 years old. 同时，男性的初婚年龄也降到最低点，低于23岁。
- The excess of affected female relaties for female probands fell as the difference in age at first stroke increased, the report indicates. 报告显示，当首次中风发作的年龄差异增加的时候，女性先证者的受侵袭的女性亲属的过多数目会下降。
- Secondly,the graph also shows that there were two stages of changes in the average age at first marriage for both men and women: from 1900 to 1940 and from 1950 to 1987. 其次，图表还显示，男性和女性的初婚平均年龄有两个阶段的变化：1900－1940年为第一阶段，1950－1987年为第二阶段。
- Heri-tabillty of age at first egg(AFG),number of egg to 300 days old(NE-300d),egg weight(EW)and num-ber of egg to 500 days old(NE-500d) were 0. 28,0.19,0. 58,0. 24,respectively. 开产日龄、300日龄产蛋数、蛋重、500日龄产蛋数的遗传力分别为：0.;28，0
- From 1900 to 1987, the lowest age at first marriage for women occurred between 1950 and 1960, when the approximate marriage age for women was slightly over 20 years old. 从1900年到1987年，女性的最低初婚年龄出现在1950－1960年这10年中，稍高于20岁。
- Tissue Factor and Platelet Glycoprotein IB-alpha Alleles Are Associated with Age at First Coronary Bypass Operation Donahue BS, et al. 组织因子和血小板糖蛋白IB-alpha等位基因与进行第一次冠脉搭桥手术时的年龄有关。
- Cook the meat quickly at first to seal in the juices. 一开始要大火烧肉，以便保存肉汁。
- Secondly, the graph also shows that there were two stages of changes in the average age at first marriage for both men and women: from 1900 to 1940 and from 1950 to 1987. 其次，图表还显示，男性和女性的初婚平均年龄有两个阶段的变化：1900－1940年为第一阶段，1950－1987年为第二阶段。
- A young maternal age at first birth, especially when younger than 20 years, was associated with chronic LBP and combined chronic LBP/UEP. 产第一胎时年龄小（尤其小于20岁时）与慢性LBP和LBP/UEP之间有联系。
- The runner was retired put out at first base. 跑垒者于第一垒上被刺杀出局。
- I should guess his age at about 30. 我想他的年龄在30岁左右。
- I fell in love with her at first sight. 我第一眼见到她就爱上了她。
- From 1900 to 1987,the lowest age at first marriage for women occurred between 1950 and 1960,when the approximate marriage age for women was slightly over 20 years old. 从1900年到1987年，女性的最低初婚年龄出现在1950－1960年这10年中，稍高于20岁。
- The matter appeared at first view of little moment. 这件事乍看起来不怎么重要。
