1.He reached puberty at the age of fourteen.

1.他14 岁时进入了青春期。

2.At the age of nineteen he began his duty.

2.他19岁时开始服兵役。

3.He ceased to write at the age of sixty.

3.他60岁停止了写作。

4.She entered a convent at the age of 16.

4.她十六岁时进了修道院。

5.She entered the political arena at the age of 25.

5.她25岁进入政界。

6.He was addicted to heroin at the age of 17.

6.他17岁的时候对海洛因上了瘾。

7.She was struck down by polio at the age of four.

7.她四岁那年因小儿麻去。

8.At the age of fourteen John really began to sprout up.

8.约翰在14岁时正开始发育。

9.At the age of six he was already composeing at the piano.

9.他六岁时即用钢琴作曲。

10.What a precocious child—reading Jane Austen at the age of ten!

10.10岁就读简·奧斯汀的作品，是早慧！

11.Cycling around France at the age of 75 is no mean feat.

11.以75岁高龄骑自行车环法是一个壮举。

12.Joe was badly bitten by the showbiz bug at the age of four.

12.乔四岁就迷上了演艺活动。

13.At the age of twentytwo he already has several tournament victories to his credit.

13.他在二十二岁时已经数次赢得联赛的胜利。

14.At the age of twenty, he decided to emigrate and seek his fortune in Canada.

14.他二十岁时决定移民去加拿发财之道。

15.Born in Madrid to parents who were Zarzuela performers, Placido Domingo moved to Mexico at the age of eight.

15.出生于马德里，父母亲都是西班牙喜歌剧表演者，多明哥在八岁时搬到墨西哥。

16.At the age of 40, King Gillette was a frustrated inventor, a bitter anticapitalist, and a salesman of cork-lined bottle caps.

16.40岁时，金·吉列不过一失意发明人，激烈的反资本主义者，软木衬瓶盖推销员。

17.Involving himself in the Liberation War at the age of 16 in literary and art work, later as editor and playwrite.

17.16岁投身解放战争，作文艺工作，后作编辑、编剧。

18.Serum and the levels of urinary LH during the ovulation from five women with eumenorrhea at the age of childbearing were tested by MAIA.

18.应用MAIA测定5名月经周期正常育龄妇女围排卵期的血清和尿LH。

19.In 2003, at the age of 85, Joern Utzon was recognised by his peers and awarded the prestigious Pritzker Prizer Prize, regarded as the Nobel Prize of architecture.

19.到了2003年，杰恩仁重85岁时得到了同行的认可，获得了著名的普利兹克奖。这个奖被认为是建筑界的诺贝尔奖。

20.The content of IgG,IgM,IgA,C3,C4 and formative ratio of ERFC and total rosette were tested on Game chicken which were fed in Xishuangbanna at the age of 60th day and 547th day.

20.检测了60日龄和547日龄云南西双版纳斗鸡的IgG,IgM,IgA,C3,C4,E玫瑰花环、E总花环等常规血液生化指标。