他的解释真是岂有此理。

tā de jiěshì zhēnshì qǐyǒucǐlǐ.

His explanation is simply unreasonable.

这个规定简直岂有此理。

zhège guīdìng jiǎnzhí qǐyǒucǐlǐ.

This regulation is simply absurd.

他的要求太过分，岂有此理。

tā de yāoqiú tài guòfèn, qǐyǒucǐlǐ.

His demands are too much; it's simply unreasonable.