We studied the topography carefully before hiking in this mountain area.

topography 由希腊词根 topos（地方）和 graphy（记录、描述）组成，字面意思是"对某个地方的描述"。在专业术语中指"地形"，即一个地区的地表特征，包括山脉、河流等自然地貌的分布情况。