geophysicist的复数形式怎么拼写？

And all sorts of climatic cycles have been proposed , says geophysicist Maria Zuber of MIT.不过大家都认为存在着所有类型的气候循环.The gravimetric crew usually consists only two persons, one geophysicist and one topographer.而且重力测量仪的操作仅需要两个人...

geophysicist的音标：geophysicist的英式发音音标为：[ˌdʒi:əʊ'fɪzɪsɪst]geophysicist的美式发音音标为：[ˌdʒioʊ'fɪzɪsɪst]...

n.地球物理学者...