You'll want to remember to use the more explicit curly-braceform when your environment variable is not isolated from the surrounding text by whitespace (Spaces or tabs).
请记住：当环境变量没有用空白(空格或制表键)与周围文本分开时，请使用更明确的花括号形式。
2
In Windows, each inner double quotation mark must be cancelled with a backslash that is within the brace surrounded by double quotation marks in the JSON form.
在 Windows 中，每一个内部双引号都必须由一个斜划线取消，该斜划线由 JSON 格式的双引号所包围。
3
You can then brace your spare foot against the wall to form a stable tripod.