No wonder the humans had such trouble maintaining clarity of thought and purpose.

Many people have trouble maintaining basic hygiene or order in their homes.

The band had trouble maintaining a consistent lineup, and later broke up in 2005.

The resemblance is so close that many performers have trouble maintaining the significance of each.

Has trouble maintaining a relationship over long periods of time.

These patients tend to have trouble maintaining pursuit velocity above 30 degree/second.

Like everyone else, they have trouble maintaining their sanity when dealing with Earth.

And it this balance that he has had such trouble maintaining.

"Bright people who have trouble maintaining their own self-esteem are often quick to point out other people's mistakes," he said.

Though slight, he had trouble maintaining a low weight and returned home without ever riding in public.