N-COUNT
（学科或活动的）界限，边界
The boundaries of something such as a subject or activity are the limits that people think that it has.
例句
The boundaries between history and storytelling are always being blurred and muddled.
历史和轶闻的分界向来是模糊而混乱的。
...extending the boundaries of press freedom.
扩大新闻自由的界限