2020年用英语表达是：two thousand and twenty year；
thousand：num. 一千; 数以千计的; 成千上万的; 许许多多的; 1 000到9 999间的数目; 千位数。
twenty：
num.二十;二十几;二十年代。
复数： twenties.
派生词： twentieth
about two thousand of them were college students.
其中大约有2千名被调查者是大学生。
The students of our college total two thousand.
我们学院的学生总计两千人。
about two thousand students were admitted to Beijing University last year.
去年北大招了二千左右学生。
We have lived in the same house for twenty years.
我们在同一座房子里住了二十年了。
I was twenty years old and ready for anything.
我当时二十岁，什么都愿意去做。
Twenty guests are enough, I would have thought.
我觉得二十位客人就够了。
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