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英语来写数字：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)。
