A small group which had penetrated deep into the hills.

There was a demand upon her that she penetrate deep into the forest.

These are surface agents only; they don't get inside cells or penetrate deep into the skin.

Penetrating deep into enemy territory with a handful of men.

Penetrating deep into our private lives, it will place absolutely unprecedented strains on the family itself.

Soviet forces were already penetrating deep into Manchukuo by that time.

Penetrating deep into the Hebrew language served him as one of the most inspiring sources.

Martine suddenly felt the intense cold penetrating deep through her body.

The roots have been observed to penetrate over a meter deep in the soil.

But it was not until two nights later, when we had penetrated deep into the mountain fortress, that the change began to make itself felt.