ефективний; чинний

Приклади використання слова «effective»:

I knew no onethere and had no chance of getting an effective disguise.
It had, Potan said, an effective range ofsome ten miles.
Youare acting wisely and in the most effective manner.
Thebank proved to be a very effective breastwork, affording us goodprotection.
This cylinder, I knew, hadan effective range of only some twenty feet.