minimum area的用法和樣例：
例句
- A cyclone in the tropics is caused by a smaller area of low pressure.
熱帶暴風是由小面積低壓引起的。 - An air craft which can take off and land vertically in a small area without the need for runways.The propellers is installed in the top of the helicopter, circumrotate flatly.
能直升直落及在空中停留的航空器，螺旋槳裝在機身的上部，作水平方向旋轉，可在小面積場地起落。
