如果解析后的上下文变量内容为空，则不会发生替换，并且变量名称在查询字符串中保持不变(包括“%”符号)。

If the resolved context variable content is null, no replacement occurs and the variable name remains unchanged in the query string (including the "%" signs).

youdao

也就是说，你可以传入任意多的，以分号分隔的字符串（包括空的列表）。

That is, you can pass in as many comma-separated strings as you want (including an empty list).

youdao

也就是说，你可以传入任意多的，以分号分隔的字符串（包括空的列表）。

That is, you can pass in as many comma-separated strings as you want (including an empty list).

youdao