用英语解释两个名词：the great depression和new deal

the great depression：the severe economic problems that followed the Wall Street Crash of 1929. In the early 1930s, many banks and businesses failed, and millions of people lost their jobs in the US and in the UK and the rest of Europe.
The New Deal was the title President Franklin D. Roosevelt gave to a sequence of programs and promises he initiated between 1933 and 1938 with the goal of giving reform to the people and economy of the United States during the Great Depression. Dozens of alphabet agencies (so named because of their acronyms, as with the SEC), were created as a result of the New Deal. Historians distinguish between the "First New Deal" of 1933, which had something for almost every group, and the "Second New Deal" (1935–36), which introduced class conflict, especially between business and unions. Opponents of the New Deal, complaining of the cost and increase in federal power, stopped its expansion by 1937 and abolished many of its programs by 1943. The Supreme Court of the United States ruled several programs unconstitutional (some parts of them were soon replaced, except for the National Recovery Administration). There are several New Deal programs still in operation; the largest such programs still in existence today are Social Security and the Securities and Exchange Commission (SEC) - the primary regulator of publicly traded U.S. firms. The New Deal represented a significant shift in political policy in the U.S., with its more lasting changes being increased government control over the economy and money supply, intervention to control prices and agricultural production, the beginning of the federal welfare state, and the promotion of trade union organizations.

大萧条,新的交易(新的单子)

The United States hasn't grappled with deflation since the Great Depression in the 1930s,in others words,it is when life was hard for most westen people .New DealRoosevelt New Deal,deals with the Grea...