twenty: [OE] Twenty is etymologically ‘two tens’. The second syllable, -ty, is related to ten, and twen- goes back to the same source as two, although its precise ancestry is not clear. => ten, two
Old English twentig "group of twenty," from twegen "two" (see two) + -tig "group of ten" (see -ty (1)). Cognate with Old Saxon twentig , Old Frisian twintich, Dutch twintig, Old High German zweinzug, German zwanzig. Gothic twai tigjus is even more transparent: literally "two tens."
The card game twenty-one (1790) is from French vingt-et-un (1781). Twenty-twenty hindsight is first recorded 1962, a figurative use of the Snellen fraction for normal visual acuity, expressed in feet. The guessing game of twenty questions is recorded from 1786.
双语例句
1. Brian counted to twenty and lifted his binoculars. Elena did the same.
布赖恩数到20，举起了双筒望远镜。埃琳娜也照着做了。
来自柯林斯例句
2. By the time he's twenty he'll know everyone worth knowing in Washington.
到20岁时，他就会认识华盛顿所有值得认识的人。
来自柯林斯例句
3. Take a hundred and twenty values and calculate the mean.
取120个值计算平均数。
来自柯林斯例句
4. Southbound traffic tailed back for twenty miles on the M5 near Bristol.
在布里斯托尔附近的5号高速公路上，南行的车辆排成了绵延20英里的长龙。
来自柯林斯例句
5. The agent spied for East Germany for more than twenty years.
