[uncountable]the process of changing or improving the condition of something or the way it works; the process of putting something back into the state it was in before重建；改造；复原
the reconstruction of the educational system教育制度的重建
the post-war reconstruction of Germany德国的战后重建
a reconstruction period重建时期
Extra Examples
The country faces a huge task of national reconstruction following the war.战后，该国面临着重建家园的艰巨任务。
a large-scale urban reconstruction project大规模的城市重建工程
companies bidding for post-war reconstruction contracts投标战后重建合同的公司
[countable]an act of acting out events that are known to have happened, in order to try and get more information or better understanding about what happened, especially a crime再现（犯罪过程等的）影片
Last night police staged a reconstruction of the incident.昨天晚上，警方放映了再现事故经过的影片。🔊🔊
The police have staged a reconstruction of the events leading up to the murder.警方放映了再现导致谋杀案发生的系列事件的短片。
[uncountable](in the US) the period after the Civil War when the southern states returned to the US and laws were passed that gave rights to African Americans重建时期（美国南北战争后南方各州重新加入联邦）
CultureDuring Reconstruction US political and military forces controlled and punished the southern states. Laws were passed making slavery illegal and giving African Americans the right to vote and hold public office. White people in the South were upset by many Reconstruction practices, such as unusual elections that put former slaves in state governments. This was one cause of the growth of the Ku Klux Klan.