The transportation cost is inversely proportional to the transportation time. We need to know the objective law of transportation. There is no transportation channel with very low price and very fast.
Transport costs and transportation time inverse proportion, we need to know the objective law of transport, there is no low price and very fast transport channels
Transportation cost is inversely proportional to transportation time. We need to know the objective law of transportation. There is no transportation channel with very low price and very fast speed<br>