十五岁

But it is not unusual for men of fifty or sixty to climb the highest mountains in the Alps.

但让一个五六十岁的男人爬阿尔卑斯山脉中最高的山是件很平常的事情。

He knows that when he's 50 and can no longer do the back-breaking labor his job requires, his boss will hire a younger immigrant.

他知道当他五十岁、体力不足以应付工作苛刻的要求时，他的老板便会雇用另一个年轻的移民。

This banyan is fifty years old.

这棵榕树有五十岁了。

Fifty years ago this month, on a foggy Saturday morning in Cambridge, England, a 24-year-old beanpole of an American scientist sat down with a few white cardboard cutouts and set off a revolution in biology.

五十年前的二月，在英国剑桥大学星期六一个雾蒙蒙的早晨，一位24岁清瘦高挑的美国科学家坐在一堆裁剪出的纸板块旁，他由此引发了一场生物学领域的革命。

Over a third of over-fifties say they have sex between one and three times a week.

超过三分之一的五十岁以上的人称他们每周会有一至三次性生活。

Thus, many individuals with bicuspid aortic valves develop clinically important aortic stenosis during late middle life sometime between the 5th and 6th decades.

所以，大部分二叶主动脉的个体在五、六十岁时出现严重的主动脉狭窄症状。

Also, the local cantina was infested with cockroaches and the only whore was a fifty-year-old grandmother.

而且，当地小酒店里满是蟑螂，唯一的妓女是个五十岁的老女人。

Thus, if we have the ability to see it (and education depends on a capacity for subtle perception), we recognize various types of people in their fortieth or fiftieth year of life, and we are able to say whether a person has been influenced by the temperament of an educator who was melancholic, phlegmatic, choleric, or sanguine.

因此，如果我们能够看到这些（教育正赖于这种敏锐觉察的能力），我们看到四五十岁的不同的人，我们就能够判断某个人曾经受过什么气质类型的教育者的影响：抑郁质，粘液质，胆汁质还是多血质。

My parents and friends wish my husband is my confidant who is five to ten years older than me.

我的家人希望我未来的爱人最好是比我大五到十岁的知己。

I am 49 and 50 is round the corner.

我已经是四五十岁的人了。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。