七十的英文：
seventy
70

Seventy to sixty-seven.
七十比六十七。

He is hard by seventy
他快到七十岁了。

He must be seventy now.
他现在准有七十岁了。

He was sixty-eight. In two years he would be seventy.
他六十八岁，再过两年就七十了。

He is getting on for seventy.
他快七十岁了。

They congratulated him on his seventieth birthday.
他们祝贺他的七十寿辰。

ON HIS seventieth BIRTHDAYGeorge Bernard Shaw
在七十寿辰宴会上的讲话

He is a man between sixty and seventy.
他的年龄约在六十到七十之间。

He is over seventy but still going strong.
他七十多了，身子骨还挺硬朗。

Though nearly seventy years of age,he is still hale and fresh as paint.
他虽年近七十，但身子硬朗，精力充沛。

Seventy thousand people will pack the stadium.
将有7万人挤满整个体育场。

For the use of seventy and seventieth see the examples at five and fifth
关於seventy和seventieth的用法见five和fifth词条中的示例

The seventies proved recycling's practicality and worth.
七十年代证实了回收利用的可行性和价值。

Seventy of the 350 naturally occurring isotopes are radioactive.
自然界有350种天然同位素，其中70种有放射性。

When you get to seventy you are not so active as you were at fifty
当你到70岁时就不会像50岁时那样有活力。