结果令人失望，至少可以这么说。

The results were disappointing, ___to ___say ___the ___least.

这顿饭不尽人意，说得客气点。

The meal was underwhelming, ___to ___say ___the ___least.

局面一片混乱，往轻了说。

The situation is chaotic, ___to ___say ___the ___least.