Caiyun feather mine
Publish: 2021-04-23 13:43:10
1.
A comma is a division mark, a group of three numbers, also known as a semicolon
this is also related to English, because there is no "ten thousand" in English, only "thousand", "million", "billion" and so on
For example, "216600" is 216600 the order of magnitude of numbers in English is 1000 times, billion = 1000, million = 1000
to separate data with commas is to make data clearer for foreigners, but not for Chinese
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