The crisis kicked from America, because American economic trade developed disparately, or the imbalance of economic trade at home and abroad made the crisis inevitable.

• 危机肇始于美国，之所以如此，是和美国国内外经济贸易不平衡分不开的，或者说，美国国内外经济贸易发展的不平衡使大危机不可避免。