When you penetrate deeply into a country, it is serious ground.

These rays go right through window glass and can penetrate deeply into the skin.

She pulled him to her as he thrust forward, penetrating deeply.

But now the lessons of our Master have penetrated deeply into my mind.

This will allow the roots to penetrate deeply into the soil.

We already know that their forces are penetrating deeply, and with great daring, into Federation space.

The dragon still could not penetrate deeply into the elf's mind.

The gas did not penetrate deeply and the damage was repaired before the next flight.

The proceedings don't seem to have penetrated deeply beyond the Beltway.

The root system is thick and penetrates deeply into the soil.