他们应该使用大写字母。
命名服务的一个常见惯例是使用大写字母来分离服务名中的单词。
One common convention for naming service uses upper case letters to separate words in the name of the service.
最后,尝试拼写单词全部使用大写字母。
Finally, try spelling words in full and using capitalisation.
It's passing to this function called toupper, which if you've never used it it actually does what it says it makes it touppercase.
它把这个传递给toupper函数,如果你们使用过,它表示的是把小写字母,转换为大写字母。
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