Crime experts say that none of the programs have been sufficiently studied to draw conclusions about their effectiveness.

Environmentalists have raised concerns about the use of additives, arguing that their impact has not been sufficiently studied.

The study reveals that the government has not sufficiently studied its own drug policy, which it calls "unconscionable".

Some experts noted that the re-use of other disposable equipment, like blood lines, had not been studied sufficiently.

In my opinion, they haven't been sufficiently studied.

Finally, the possible presence of other persistent radioactive substances, such as strontium-90 or plutonium, has not been sufficiently studied.

Throughout the afternoon, speakers said the impact of the project had not been sufficiently studied.

Rhodan had studied the yacht's blueprints sufficiently to be familiar with the small ship from the ground up.

"The young man had not sufficiently studied the subject," he said.

Students often report "blanking out" even though they have studied sufficiently for the test.