n.冲积土，表土，冲积层...

One obvious impact is the radical atteration of the land surface.一种显而易见的影响是大地表面剧烈的改变....

atteration的音标：atteration的英式发音音标为：[ətə'reɪʃn]atteration的美式发音音标为：[ətə'reɪʃn]...