aerobic walking and running的用法和样例：
- Circus clowns are experts at walking and running on stilts.
- Practice walking and running on it without a blindfolded.
- Walking and running are all healthy forms of exercise.
- Two basic locomotion models of walking and running f or virtual humans and their control methods is studied.
- The biggest muscle in the body is the gluteus maximus, in the buttock. It pulls the leg backwards powerfully for walking and running.