difficult to understand

In circumstances like this, it's even more difficult to understand how the failings that have driven headlines for days - and done terrible damage to the BBC's reputation - could have occurred.

It is difficult to understand why these sorts of attacks happen even when the motive is known.

"To come in and see those riots within the community where these three little girls had lost their lives and everybody else had been impacted in the way that they had was really distasteful for us, it was difficult to understand why it was happening, and it had a real impact on the families as well."

For an outsider, it may be difficult to understand her appeal.

“People have said before that my comedy is smart or intelligent. That starts to sound like it’s one of those acts where you’ve got to have a degree in liberal arts to understand it. Nothing I do is difficult to understand. It’s all very basic and moronic.”