2017 actually marks their seventieth wedding anniversary.

2017 年是他们结婚 70 周年。

We have, this year, marked the seventieth anniversary of the foundation of the United Nations.

今年是联合国成立70周年。

He was touching his seventieth year, and though he had a very well-tempered constitution, his hold upon life had lost its firmness.

他快七十岁了， 虽然体质很好， 但对生活的把握却失去了坚定。

Then he lit his seventieth cigarette of the day and sat down at the writing-table with the thick wad of his stake money and winnings beside him and entered some figures in a small note-book.

然后他点燃了当天的第 70 支香烟， 在写字台前坐下， 旁边放着厚厚一叠赌注和赢来的钱， 在一个小笔记本上输入了一些数字。

In the matter of years, therefore, his career apparently belongs to the ante-bellum days, yet the most remarkable fact about this remarkable man is that his real life work did not begin until he had passed his seventieth year.

因此，就年岁而言，他的职业生涯显然属于战前时期，但这位杰出人物最引人注目的事实是，他真正的人生工作直到他七十岁才开始。