trade balance

a hermit nation

import tariff

exclusive contract

spot market

In matters relating to the environment, the United Nations Conference on Environment and Development, held in June 1992 in Rio de Janeiro, produced an “ Earth Charter”, or declaration of basic principles for the conduct of nations and peoples with respect to environment and development; agreements on specific legal measures, including conventions （公约）on climate change and biodiversity, and principles for a framework agreement on forests; and an agenda for action （ “Agenda 21”）, establishing the environmental work program agreed by the international community for the period beyond 1992 and into the twenty-first century.

The pattern of China’s foreign trade has changed substantially since China opened to the outside world.

The sophistication of the industrial structure needs the support  of advanced technology.

A number of countries in the EU are confronted with debt problems.

By opening the district to foreign investments, competition was introduced into its economy.