用介词at，at the side of the road意思是在马路边，例如：
1.The car slid into a donga at the side of the road.汽车滑进了路旁边的深沟。
2.He pulled in at the side of the road.他靠边停了车。
3.Truck Driver A truck driver was zooming down the highway when he saw a priest at the side of the road. Feeling it was his obligation, he stopped to give the priest a ride.卡车快速行驶在高速公路上。司机见有个神父站在路边，觉得有义务要帮助他，于是把车停了下来，让神父上来。
,在马路边，英语短语应该是on the side of the road，意思就是在马路的上面，英语讲究准确性，不用介词at或者by，At指的是一个时间的点或地点的点，是英语中最小的介词，By是靠近的意思，例如At the end of the road，You can see the post office，在这条路的尽头，你会看到邮政局的，WHO is that girl standing by the window，站在窗户旁边的那个女孩是谁？
