Blacklists are effective only when a website is requested directly.
Some vaccines are effective only when alive and therefore potentially dangerous.
But they are effective only when it is applied externally, and in its undiluted form).
Apparently, Mr. Grubman is effective only when stock prices are rising.
Videos, like pictures, are effective only when the people looking at them are willing to really see what's there.
The members of the society were not shamans, had no individual powers, and were effective only when they acted together.
But they are in the minority, and they can be effective only when the majority is ready to tolerate them and pay the price of their hatred.
In the middle, the smallish D'Qwell Jackson is highly productive but truly effective only when he can run to the ball without encountering blockers.
However, that technique was effective only when the offense was still hot off the summons pad, before the details had been entered into the computer system.
Institutions become effective only when they are adequately enforced.
RCC1 blockage was effective only when a nanoparticulate delivery approach was adopted.
