When it is seen to have risen too far, the central banks of major countries cooperate to intervene.

Don't intrude on her privacy.

In order to prevent a further drop of the Japanese currency, the Bank of Japan intervened in the market to support it at around 150 yen to the dollar.

The police intervened in the disturbance.

There may be other factors that intervene in the relation between these two constants.

It has been shown in most studies on this subject that intervention of the legislature had adverse effects.