adjacent free area的用法和样例：
- Once the time runs out, players should keep away from the waiting line and take a rest in the free area.
- "The Internet is the freest area of the media in Russia," writes the AFP.
- The value of the area is direct proportional to the number of baffler and the parameter of free area ratio, but it increases exponentially with the diameter of the column and the pulsed amplitude.
- Based on physical simulation experiments, the relationship between the upswelling area on top of ladle with various technical parameters was obtained,so did the dimension of oil free area.