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I often see numbers written like this: 19.456 thousand or this: 19,456 thousand. Neither is correct in English, and both may cause confusion.

我经常看到有人这么用来写数字：19.456千，或者19,456千。这两种写法都不对，而且会引起误会。

In English we do not mix numerals and words unless we are using the words “million”, “billion”, “trillion” etc. So, it is wrong to write, e.g., 24 thousand; instead you should write 24,000 or twenty-four thousand.

在英语中，除了表示“百万”，“十亿”，“万亿”等词外，数字和单词是不能混用的。比如，你如果写24千，那就是错的，你应该写成24,000 或者twenty-four thousand（用数字，就全部用数字；用单词，就全部用单词；不能夹杂着用）。

19.456 thousand or 19,456 thousand should therefore be written in English in either of the following ways:

所以，19.456千，或者19,456千应该按照下面这样的方式写才对：

19,456,000 or 19.456 million (read as “nineteen million, four hundred and fifty-six thousand” or “nineteen point four-five-six million”)

19,456,000 或者19.456 million（读作，一千九百四十五万六千）。