名詞 eighty:

1. the cardinal number that is the product of ten and eight
   同義詞：80, LXXX, fourscore

形容詞 eighty:

1. being ten more than seventy
   同義詞：80, lxxx, fourscore

1. He must be getting on for eighty!
   他一定快八十了！
2. He's eighty if he's a day!
   他至少八十歲了！
3. He is over eighty, but he still dodders along.
   他年過八十，但仍蹣跚而行。
4. Although he is over eighty, he looks hale and healthy.
   盡管他已經(jīng)八十多歲了，看上去還很健壯。
5. A bishop keeps on saying at the age of eighty what he was told to say when he was a boy of eighteen.
   主教年屆八十，仍舊像他還是個年方十八的小伙子之時被吩咐要做的那樣，把那一套講了六十多年的老話繼續(xù)講下去。
6. Although he's over eighty his mind is still remarkably alert.
   他雖已年過八十，但頭腦仍然十分機(jī)敏。
7. There are eighty pages in this book.
   這本書有八十頁。

eight.y

n.（名詞）
【復(fù)數(shù)】 eight.ies
The cardinal number equal to 8 × 0.
八十：等于8×0的基數(shù)
eighties
eighties
Often Eighties The decade from 80 to 89 in a century.
常作 Eighties 八十年代：某一世紀(jì)從80到89的十年
A decade or the numbers from 80 to 89:
從80到89的十年或十個數(shù)：
例句：
They were still active in their eighties. Before noon, the temperature shot into the eighties.
雖然已年過八十，他們?nèi)匀缓芑钴S。中午之前，氣溫就升高到八十多度

來源：
Middle English eighti
中古英語 eighti
from Old English eahtatig * see oktô(u)
源自 古英語 eahtatig *參見 oktô(u)

【引伸】
eight.y
adj.（形容詞）
pron.（代詞）