It's the background note.

这只是个背景信息。

youdao

But even in this region, gains in hunger reduction have been reversed as a result of high food prices and the current global economic downturn (see background note).

但即便在这一地区，高粮价和当前全球经济衰退亦破坏了在减少饥饿方面取得的成果(见背景说明)。

youdao

Background music is romantic, and note the word "background," because not just any music is romantic.

背景音乐很浪漫，注意是“背景”，并非所有音乐都浪漫。

youdao

Its absence of a cereal background note also differentiates it from Scotch, as does the use of the intensely aromatic Japanese oak.

FORBES: Fine Whiskey From Japan - The Next Big Thing

Note: Further information on the constitutional background of Lithuania is provided by the International Constitutional Law Project at the University of Wuerzburg.

UNESCO: Lithuania - Constitution

Note: Further information on the constitutional background of Ireland is provided by the International Constitutional Law Project at the University of Wuerzburg.

UNESCO: Ireland - Constitution