求用英文解释几个单词!

1 关税制度
2.货币波动
3.投资条例
4.环境限制
5.外交关系和贸易制裁
6.安全条列
7.移民政策用英文解释这几个单词 = =1. Tariffs --A tariff is a tax levied on imports or exports.2. Currency Fluctuation --Changes in the value of one currency relative to another.3. Investment Regulations ---laws to protect and limit pepole putting money into something with the expectation of profit.谢谢还有几个 3.34.Environmental Restrictions --are laws to protect environment resources such as groundware quality, plants, air quality being destroyed. In reference to coal accessibility, land-use restrictions that constrain, postpone, or prohibit mining in order to protect environmental resources of an area; for example, surface- or groundwater quality, air quality affected by mining, or plants or animals or their habitats.5.Foreign Relations and Trade Sanctions ---Foreign Relations is having co-operations with other countries on trade, culture, education etc.; Trade Sanctions is a country to protect it's instrests in fild of trade, made trade penalties imposed by a country or group of countries on another country or group of countries6. Safety Regulations --are laws to indicate safty standards and guidelines for the workplace.7. Immigration Policies--are policies of a government that deals with the transit of persons across its borders into the country, but especially those that intend to work and to remain in the country有个别可能表达的不是很专业，希望对你有帮助。