actual calculating area的用法和样例：
- The modeling region is optimized by directly reducing the calculating area using FDTD subdomains-synthesized method.
- The method resolved the defects caused by common methods with planimeter on calculating area, which produce low...
- A student who learns to handle numbers mentally can focus on how to attack a problem and then complete the actual calculations easily.
- The actual calculation indicates that the ethod mentioned in this paper is not only simple, visualized in eom-etry significance but also valuable practically to a ertain deg-ree.