历史学

• civil war

  After the Civil War, use of the reason of policy increased.

  内战以后，总统以政策为理由否决的议案数量增多。

经济学

• civil war

  The third one is from 1861 to 1879, the high duties during the Civil War was continued after the war.

  第三个阶段从1861年莫里尔关税法出台到1879年,内战时期的高关税政策在战争结束后被延续下来,关税税率较高。