reference aids的用法和樣例：
例句
- Official Documents is the official reference facility for Command and departmentally sponsored House of Commons Papers.
英國官方文件是官方的參考工具。 - Online help is just like printed documentation, a reference tool for perpetual intermediates.
在線(xiàn)幫助就像是打印的文檔，為永久的中間用戶(hù)提供參考工具。
