罗纳德-里根是第40任美国总统（1981-1989）。

Ronald Reagan was the 40th President of the United States (1981–1989).

作为总统，里根实施新的政治倡议以及经济政策，主张有限政府和经济自由放任理念。

As president, Reagan implemented new political initiatives as well as economic policies, advocating a limited government and economic laissez-faire philosophy.