But they don't help or suit everyone and can cause important side effects.

To find out if something really works, all important effects need to be studied.

Guns were to have an important effect on African military systems.

That did occur, but it was not the most important effect of the program.

The increase in voters may be the most important effect, though.

But I think that record had an important effect on me.

And this had important effects on the progress of life.

One important effect of noise is to make a person's speech less easy to hear.

But over 75 years and longer, he said, it would have an important effect.

The growth of the stock market is having an important effect on China as a whole.