Trust, as a society, is something that most people understand poorly.

The cause and role of this increase is poorly understood.

Many factors are poorly understood and subject to much change as research is done.

However, the specific local structure of these materials is still poorly understood.

But the process, and the conditions it requires, have been poorly understood.

Even with today's knowledge and technology, many disease processes are poorly understood.

However, this is a complicated and poorly understood area of development.

There are at least fifteen species and the relationship between several of them is poorly understood.

Exactly how the two conditions are linked remains poorly understood.

The environmental causes of health problems are complex, global, and poorly understood.