A multi-line loop to print all the environment variables in lowercase, with the first letter uppercase, and sorted.
除首字母大写外、用小写字母打印并排序所有环境变量的多行循环。
A one-line loop to print all the environment variables in lowercase, with the first letter uppercase, and sorted.
除首字母大写外、用小写字母打印并排序所有环境变量的单行循环。
The first is a 2-letter lowercase language code, termed the ISO 639 code and the second is a 2-letter uppercase country code, termed the ISO 3166 code (see Resources).
第一个代码是两个字母小写语言代码,称为ISO 639码,第二个代码是两个字母大写国家代码,称为ISO 3166码(参见参考资料)。
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