If business is now a global affair, then the export-import business is important, lucrative and necessary. An export-import agent is not a broker --- the agents are lower on the business totem pole.
Most properties are measured using a number and a unit of measurement. The unit of measurement is a standard amount. The number compares the property to that standard amount. This means a tree that is ten times as tall as a meter stick is 10 meters tall.
Length is the distance from one end to the other end of an object. There are two systems for the measurement of length. One is the metric system and the other is customary system. The units of metric system are centimeter, meter, kilometer, millimeter, etc.