______ , all machines are combinations of simpler parts such as the lever, the pulley, and the inclined plane.
______ , all machines are combinations of simpler parts such as the lever, the pulley, and the inclined plane.
______ , all machines are combinations of simpler parts such as the lever, the pulley, and the inclined plane.
The reference to a "simpler life" in line 8 is used to ______.