2001 用英文怎么读出来？

如果表示金额，习惯用楼上的two thousand and one
如果你表示年份，用two thousand one

如果是作数字，应该是 two thousand and one;
如果是2001年的话，貌似应该是 Two Thousand and First.

twenty and one
twenty o one
two thousand and one

三个读法都正确。

two thousand and one

1- two 0 0 one
2- two zero zero one
3- two thousand and one