pass by可以直接结尾，后面可以不加宾语
pass by是指经过人或物的面前或旁边而不停顿，基本上意思是“过”，指逐渐地、平稳地转入另一种状况:
They were injured when a parked car exploded as their convoy passed by.
他们的车队经过时，一辆停放着的汽车爆炸了，他们受了伤。
As they pass by， a piteous wailing is heard.
他们经过时，响起了令人哀怜的恸哭
walk by 必须接宾语
walk by:在…旁边走过走过
其它短语：
walk away 走开离去
walk back 向后走倒转绞盘
talk big v.吹牛
walk off 离开带走用散步消除
例句：
Many a time we walk by the river.我们常常在河边走.
We went for a walk by the lakeside.我们沿湖边散步。
I often walk by the sea to commune with nature.我常在海滨漫步，与大自然神交.
Let faith be your cynosure to walk by.让信仰成为你生活中的灯塔.
