Investment boosts labor productivity because workers can produce more per hour when they have more and better equipment and better skills (capital deepening).
Better equipment and better skills boosts labor productivity.
Better equipment makes workers lazy and decreases productivity.
a girl rides a skateboard naked
There are people walking.
A plane is flying over a group.
I believe Johnny is going to keep an eye on him for a long time now.
I have never tried to sit and look for them.
The camp was left defenseless.