What does it mean if the opportunity costs differ between two countries?

Question

Quizplus · Accepted Answer

If the opportunity costs differ between two countries, it means that each country has a comparative advantage in producing some goods more efficiently than the other. This creates the possibility for both countries to specialize in producing goods they are relatively better at producing and trade with each other to gain from the differences in opportunity costs. Therefore, it is possible for both countries to gain from specialization and trade.

What Does It Mean If the Opportunity Costs Differ Between