seventy
词根词缀：
后缀
-ty 表名词
1 用在形容词后，把形容词变成名词，“性质，情况，状态”
2 “…十”
eighty num. 八十
fifty num. 五十
seventy num. 七十
sixty num. 六十
数据来源：新东方英语词汇速记大全
相关例句：
The heart makes from seventy to eighty beats a minute.
心脏每分钟跳70至80次。
He was sixty years, in two years he would be seventy.
他六十八岁，再过两年他就七十岁了。
Can you imagine, "she said." Seventy dollars and I had to kiss him too!
你能想象吗，她说，付了他70元，我还得亲他！
This house was built seventy years ago.
这座房子是七十年前造的。
Seventy people were killed.
70人丧生。
My weight went down to seventy pounds
我的体重减到了70磅。