Too much concentration on ourselves makes us anxious, because the self cannot support the weight.

That concentration of ownership would make a hostile takeover difficult, analysts said.

But the concentration of defense work in Connecticut makes it unique, officials said.

The concentration of energy in such a small area made them almost painfully hot.

He tried to listen for it; but his concentration only made him all the more conscious of the noise outside.

And the new concentration made him see the situation objectively.

The high concentration of higher learning institutions makes Manila the country's educational capital.

Only the most intense concentration made picture viewing possible, and it was never very pleasant.

It seemed that this additional concentration of metal made them of interest.

Their higher concentrations make them unsafe for use by the non-qualified.