seventy
/ˈsevəntɪ/cardinal number
(pl. -ies)
1- the number equivalent to the product of seven and ten; ten less than eighty;70七十; 七十个：
about seventy people attended
大约70人出席
seventy were arrested.
70人被捕了。
(Roman numeral: lxx or LXX. 罗马数字：lxx 或LXX.)
1.1
seventies
the numbers from seventy to seventy-nine, especially the years of a century or of a person's life七十几; 七十年代; 七十几岁：Dad was now in his seventies.
爸爸现在70多岁了。
1.2
- seventy years old七十岁：
she was nearly seventy.
她快70岁了。
1.3
- seventy miles an hour时速七十英里：
doing about seventy.
每小时行驶约70英里。
1.4
- a size of garment or other merchandise denoted by seventy（衣服等商品的）七十号。
派生词
seventieth
ordinal numberseventyfold
adjective & adverb词源
Old English hundseofontig, from hund- (of uncertain origin) + seofon 'seven'.