I am new to GIS and I try to use the following code to display a pacific-centered world map.

+proj=robin +lon_0=-198 +x_0=0 +y_0=0 +ellps=WGS84 +datum=WGS84 +units=m +no_defs

However the map displayed is a bit messy as below:

I'm wondering whether I can limit the map within two longitude lines to eliminate those horizontal lines. However I don't know the proj4 code to realize this.