Because actually it's not the dollar. It's actually the peso in Buenos Aires. Very clever Buenos Aires street vendors decided to practice price discrimination to the detriment of any passing gringo tourists.
因为实际上那不是美元，而是比索 在布宜诺斯艾利斯，非常聪明的街头售货商 决定实践一下这种价格歧视 用来占任何一个路过的美国佬的便宜。