geographer的复数形式怎么拼写

geographer的音标：geographer的英式发音音标为：[dʒi'ɒgrəfə(r)]geographer的美式发音音标为：[dʒi'ɑgrəfə(r)]...

His grandfather is a geographer.他的祖父是一位地理学家.Groups of geographer to study the special rock formations.很多地质学家来到这里,研究特殊的岩层.Li Siguang is a famous geographer.李四光是一位著名的地理学家....

n.地理学家...