This law was designed to block access to child pornography.

But drugs designed to block its action have had only limited success.

"Our involvement is not designed to block research," he said.

Some drugs, about to be tested, are designed to block development of the illness rather than treat its symptoms, now the standard procedure.

Several neurotoxins, both natural and synthetic, are designed to block the action potential.

The arrangement was designed to block direct sunlight without obscuring the view of Mercury.

The Wall is designed to block the flow of information legitimately acquired by one department, to other departments.

In Congress, lawmakers have introduced at least two or three bills designed to block the sale.

It appears to be designed primarily to block transporter operation.

The network is protected by an electronic fire wall designed to block outsiders from gaining access.