求翻译：美国作为自然资源丰富、幅员辽阔的经济发达国家，跨国经营的历史相对较长，其跨国并购风险管理的经验丰富，战略取向的水准也较高。1990年以后美国加强了风险防范战略上的转交。新的风险防范战略强调从风险的消极防御向风险的积极防范转化，从地区性风险防范向全球性风险防范转化。这样的战略转型有利于防范因东道国的政府行为而导致的政治风险以及行业风险。是什么意思？

The United States is rich in natural resources, vast economically developed countries, the transnational operations of a relatively long history, rich in its cross-border mergers and acquisitions experience in risk management, strategic orientation level is also higher. After 1990 the United States

The United States, as rich in natural resources, is a vast territory of the economically developed countries, and multinational operations in a relatively long history, its cross-border risk management strategy, the experience to a higher standard of. Since 1990, the United States strengthen risk-pr

United States as a rich and vast natural resources of economically developed countries, transnational operations of relatively long history, its experience of transnational merger and acquisition risk management, strategic orientation level is quite high. After the 1990 United States on strengthenin