以上就是本站详细整理的词语by the age of是什么意思的翻译解释，供大家参考一下。
By the age of 40, some people are already experiencing breathlessness.(到40岁时，有些人已经感到气绝。)
Even so, it admits that most children will have been infected by rotavirus by the age of 5.(既便如此，在5岁多数儿童已受轮状病毒感染。)
By the age of 40, men's quality of sleep also begins to diminish.(大约在40岁左右，男子的睡眠质量就开始下降。)
A surprising discovery suggests our mental faculties have not yet been fully tapped by the age of 30.(一项令人惊奇的发现表明，我们的心智能力在30岁并没有完全成熟。)
By the age of 21 he controlled the company.(他21岁就掌管了公司。)
By the age of sixteen he was the junior lightweight champion of Poland.(16岁时他已是波兰少年轻量级冠军。)
By the age of 40, 90% of men and women will have been married at least once.(40岁时，90%的男性和女性至少经历了一次婚姻。)
Children ought to be able to read by the age of 7.(儿童7岁时应该识字了。)
If you can get kids by the age of 19, they don't start smoking hardly after that.(如果孩子们在19岁的时候就吸烟，他们从那以后很难不去吸烟。)
In some sports you're past it by the age of 25.(在某些运动中，人过25岁就难有作为了。)