英语单词讲解 unit 26
In economics and finance, marginal cost is the change in the total cost that arises when the quantity produced has an increment by unit. That is, it is the cost of producing one more unit of a good.
Economic sanctions are domestic penalties applied by one country (or group of countries) on another country (or group of countries). Economic sanctions may include various forms of trade barriers and restrictions on financial transactions. Economic sanctions are not necessarily imposed because of economic circumstances — they may also be imposed for a variety of political and social issues. Economic sanctions can be used for achieving domestic political gain.
The term business cycle (or economic cycle or boom–bust cycle) refers to fluctuations in aggregate production, trade and activity over several months or years in a market economy. The business cycle is the upward and downward movements of levels of gross domestic product (GDP) and refers to the period of expansions and contractions in the level of economic activities (business fluctuations) around its long-term growth trend.