12000 two 3 three

two three double O不太标准,因为零在数位的中间,可以读成O,但是在开头和末位一般读zero,比如203可以说是two O three,230一般就说two three zero.
2300 还可以读成two thousand three hundred
2000 two thousand,或者twenty hundred.一般不读two 后面跟若干零

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