1.   He threads his way through narrow alleys where the sun never penetrates.

2.   They basked like reptiles till the sun penetrated the threadbare material and warmed them into movement.

3.   During March, freezing rain is uncommon during the day because the strengthening spring sun penetrates the overcast, warming dark pavement.

4.   Few people apply sunscreen under their everyday clothing, but did you know the sun can penetrate ordinary summer-weight fabrics?

5.   In addition, despite clouds, the strengthening March sun penetrates the overcast keeping pavement warmer and discouraging snow from accumulating.

6.   In spite of clouds, the strengthening March sun penetrates the overcast, keeping pavement warmer and discouraging snow from accumulating.

7.   The strengthening April sun penetrates the overcast, helping to keep pavements warm and discouraging snow from accumulating.

8.   You want to shape the climber, so sun can penetrate the plant.