This is converted to a single hyphen when you want to use the probe during tracing.
2
命名元素的名称ID是元素的完全资格名称,带有:(两个直线)序列被双下划线(__)所代替。
The ID for the name of a named element is the fully qualified name of that element, with the: : (two colons) sequences replaced by double underscores (__).
3
可以用双下划线分隔探测名中的单词。
You can separate words within the probe name using a double underscore.