fifty
/ˈfɪftɪ/cardinal number
(pl. -ies)
1- the number equivalent to the product of five and ten; half of one hundred;50五十; 五十个：
only fifty per cent of the aircraft were serviceable
只有50%的飞机还能用
about fifty of us filed in
我们中间约有50人依次走了进去
a fifty-pound salmon.
一条50磅重的大马哈鱼。
(Roman numeral: l or L. 罗马数字：l或L.)
1.1
fifties
the numbers from 50 to 59, especially the years of a century or of a person's life五十到五十九之间; 五十年代; 五十到五十九岁时期：Elvis is the icon of the Fifties.
埃尔维斯是50年代的偶像。
1.2
- fifty years old五十岁：
she looked about fifty.
她看上去约50岁。
1.3
- fifty miles an hour五十英里的时速：
doing about fifty.
以每小时约50英里的速度行驶。
1.4
- a size of garment or other merchandise denoted by fifty（衣服等商品尺码的）五十号。
1.5
- a fifty-pound note or fifty-dollar bill五十英镑（或五十美元）的钞票。
派生词
fiftieth
ordinal numberfiftyfold
adjective & adverb词源
Old English fīftig （see FIVE, -TY2 ）.