num.七十，七十几，七十年代
n.七十几，七十年代

原形：seventy复数：seventies

The letter has seventy words.
这封信有70个单词。
Eric is seventy years old.
埃里克七十岁了。
I'm seventy years old, but I still enjoy playing tennis every week.
我七十岁了，但每周我还是喜欢打网球。
She has seventy books in her personal library.
她的个人图书馆里有七十本书。
The company has a workforce of seventy employees.
这家公司有七十名员工。
The town has a population of approximately seventy thousand.
这个镇大约有七万人口。
We need to collect seventy signatures for the petition.
我们需要为请愿书收集七十个签名。
The car can travel seventy miles per hour.
这辆车能以每小时七十英里的速度行驶。
He has seventy unread messages in his inbox.
他的收件箱里有七十封未读邮件。
The pensioner receives a monthly income of seventy dollars from the government.
这位退休人员每月从政府那里领取七十美元的养老金。
There are seventy days left until my vacation.
离我的假期还有七十天。
The exam consists of seventy multiple-choice questions.
这次考试包括七十道选择题。