含twenty的成语
(1) twenty times 很多次
We have been to the school twenty times.
我们已经去过这所学校很多次。www.examw.com
(2) twenty-twenty 视力正常的
I am a twenty-twenty student but many of classmates are near-sighted.
我班的许多同学都得了近视, 可我的视力却很正常。