a pole的用法和樣例：
例句
- Our flag is raised to the top of a pole by a rope and two pulley.
我們的旗幟被用一根繩子和兩個(gè)滑輪升到了竿頂。 - He had put up a basket on a pole in the back yard.
他在后院一根柱子上安一個(gè)球籃。 - A West Indian dance in which the dancers keep bending over backward and passing under a pole that is lowered slightly each time.
林波舞一種西印度群島的舞蹈，舞者須向后仰并穿過(guò)一支水平桿，每次都要比前一次仰得更低
