Their quality changed, but he could not explain to himself how, or in what way.

When you are here, I will explain everything in person.

I can explain the situation in a few words, however.

He made an effort to explain himself, once again, in terms others could understand.

Three people were expected, and he can't explain in words what has happened.

He looked about the group, and decided to explain in full.

Every effort is made to explain these terms in simple language.

What's going on here can be explained in two ways.

All would be explained in the morning, he told us.

And so we're going to explain it all in the next hour.