By age 16 he was playing professionally with bands in Greenwich Village.
到16岁时，他已在与格林尼治村的各乐队进行职业演出了。
By age 15, he had become an apprentice to Sylvain Bailly, a well-known dessert chef with a successful bakery in one of Paris' most fashionable neighborhoods.
从15岁开始，他就成为了西尔文·贝利的学徒。西尔文·贝利是一位著名的甜点师，在巴黎最时尚的街区之一经营着一家成功的面包店。
By age 15, he had become an apprentice to Sylvain Bailly, a well-known dessert chef with a successful bakery in one of Paris's most fashionable neighborhoods.
从15岁开始，他就成为了西尔文·贝利的学徒。西尔文贝利是一位著名的甜点厨师，在巴黎最时尚的街区之一有一家成功的面包店。
By age 17, he was known for his talent in music.
17岁那年，他就因其音乐天赋出名。
In 1962, 50% of Americans were married by age 21.
1962年，有50%的美国人在21岁之前就结婚了。
With inflation, the family's spending on a child will total $286050 by age 17.
随着通货膨胀，家庭在孩子身上的花费在孩子17岁时将达到286050美元。
Senior citizen discounts are the essence of the very thing older Americans are fighting against-discrimination by age.
老年人特有的优惠正是美国老年人反对年龄歧视的本质。
Abing's father taught him to play many musical instruments, such as the drums, dizi and erhu, and by age 17, Abing was known for his musical ability.
阿炳的父亲教他演奏许多乐器，如鼓、笛子和二胡，17岁时，阿炳就因他的音乐才能而闻名。
Life Lessons Learned by Age 26.
26岁时要学会的人生26课。
By age 100, the number spikes to 60 percent.
到了100岁，人数会增加到60%。
He intends to earn the two degrees by age 22.
他表示，希望自己能在22岁时获得上述两个学位。
Children were randomly divided into pairs by age-group.
孩子们根据年龄段被随机分成两两一组。
Leading causes of death by age in the African Region, 2002.
2002年非洲区域按年龄分列的主要死亡原因。
By age 28, I was vice President in charge of sales in the United States.
我表现出色，28岁就晋升为主管国内销售的副总裁，薪金优厚。
And half the women in the US will have an unintended pregnancy by age 45.
而且在美国，有半数妇女到45岁时都会有意外怀孕的经历。
More than half of Americans will have developed some degree of cataracts by age 80.
超过一半的美国人在80岁前都会得一定程度的白内障。
By age 10, linguists say, our ears become "stiff" and cannot learn new pronunciations.
语言学家说人到了十岁的时候耳朵就“僵化”了，没法再学习新的语音。
The second chart in Nielson’s report shows how the smartphone segments break down by age groups.
在Nielson的报告的第二个图表展示了智能手机在不同年龄阶段消费者中的占有率分布。
While new language learning is easiest by age 7, the ability markedly declines after puberty.
7岁之前容易掌握第二语言，青春期之后这种能力明显逐渐下降。
Women who start their family in their 20s or complete it by age 35 face significantly reduced risks.
妇女在20多岁开始生育或在35岁前完成生育面临的风险则大大降低。
Good suggestions, even if not everyone follows them: by age 12, 50 percent of children have cavities.
有些看法即使不是每个人都照做但也绝对不假：在12岁以前，50％的儿童都会长虫牙。
The patterns of illicit drug use showed significant variations by age within the 50-and-over population.
通过调查图表我们可以看出，50岁以上的人随着年龄段的不同，用药情况呈现出显著差异。
Many people wonder whether or not jealousy is influenced by age, gender, ethnicity or other factors.
很多人想知道是否嫉妒会受诸如年龄、性别、种族等因素的影响。
There is a steep gradient in survival by age, with younger women having a better prognosis (Figure 3.2).
在年龄相关组中生存率曲线呈现了斜坡式的变化，显示更年轻的妇女有更好的预后（表3.2）。
Girls love to play with toys too but usually lose interest by age 12 as they begin to grow into young women.
女孩也喜欢玩玩具，但是，通常到12岁就失去了兴趣，因为她们开始成长为年轻女人。
By age 24, 22.9 percent were married, and by age 29 that number jumped to 58.8 percent, the researchers found.
研究发现，24岁时有22.9%的人已婚，到29岁时这个数字升至58.8%。
By age 24, 22.9 percent were married, and by age 29 that number jumped to 58.8 percent, the researchers found.
研究发现，24岁时有22.9%的人已婚，到29岁时这个数字升至58.8%。
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