And natural things aren't all that run wild, once introduced here.

Once introduced, a bill must go through a number of stages before it can become law.

Once introduced the bill goes through several stages of consideration.

A friend once introduced her, by e-mail, to a foreign man, an American, and a correspondence began.

I've only just been introduced to him once by a mutual friend.

They had been introduced once at a party and had never seen each other since.

Once introduced, it can eliminate a colony within three months.

But it cannot arise when we have once introduced a reasonable degree of social justice.

California's June primary once introduced a half-time break in the campaign.

Once introduced, it is usually accepting of novel people or situations.