But in the European studies, the drug remained somewhat effective over time.

The sensors are effective over distances of up to 50 feet.

It is less effective in women weighing 90kg (14st) and over.

That charge will be effective over the next 15 years, she said.

The Devils took the lead in the series because they were effective over all.

The new salaries will become effective over the next two years, not in 1987-88.

They typically vest, or become effective, 25 percent at a time over four years.

It is, however, less effective over a period and tends to be more expensive.

"This makes it effective over a long period of time."

The teacher's commitment to the children can be very effective over a two-year period.