很高兴为您
on有“坐落...之上”之意.请见柯林斯词典解释:
柯林斯英汉双解大词典
PREPIf something is situatedona place such as a road or coast,it forms part of it or is by the side of it.(坐落) 在…上; 在…旁
The village is on a river 这个村庄坐落在一条小河之上.
【小河是穿过村庄的,其两边都有村庄,所以用on】
beside是“在.旁”,与on有很明显的区别,其意思很好理解,就不多解释.
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