学校出色的成绩不言自明。

The school's excellent record ___speaks ___for ___itself.

一方面，体育赛事的经济成功不言自喻。

On the one hand the economic success of sports events ___speaks ___for ___itself.

她对项目的奉献精神不言自明。

Her dedication to the project ___speaks ___for ___itself.