These new groups have made themselves more difficult to penetrate.

Her eyes could penetrate the night for only a few feet.

On day three we penetrate the city for the first time.

But my voice must not have been able to penetrate the door.

But it was not easy to penetrate the black position.

And that made me penetrate the green, get away from people.

It was also dark since the natural light could not penetrate far.

Still in that room- The idea took a moment to penetrate.

What force on earth could penetrate such a wall of men.

But even if they did the sun would not penetrate here.

Never before has one of us been able to penetrate within this place.

"You should all find a place to rest, be sure no light can penetrate."

It should be able to penetrate Iraq's defense line in no more than half a day.

The woman also said she could not be certain what had penetrated her.

No sound penetrated from the night out of which he had come.

But I need to know how far we have been penetrated.

Here came in the great space of life into which no one had ever penetrated.

We'll penetrate until we can hear each other through the rock.

These however, were never able to penetrate the international market to any significant degree.

What power was this that he could not penetrate light?

She looked to one side to see what had penetrated her.

The other had just penetrated far enough to go through the body.

As if that were not enough, the book would "penetrate the changes of the past and present."

One is to be very deep, penetrating perhaps 1,640 feet.

Her black eyes, penetrating still, must once have been beautiful.