求用英文解释几个单词!

求用英文解释几个单词!
1.Tariffs
2.Currency Fluctuation
3.Investment Regulations
4.Environmental Restrictions
5.Foreign Relations and Trade Sanctions
6.Safety Regulations
7.Immigration Policies
请求用英文解释这几个单词！回答者感激不尽。
（强调不是中文翻译喔！）

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
再问： 用英文解释这几个单词 = =
再答： 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.
再问： 谢谢 还有几个 3.3
再答： 4.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 countries 6. 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。

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