fact

详细解释:n. 事实, 真实性, 真相, 细节, 论据
相关词组:
in fact
in point of fact
as a matter of fact

英语解释：

名词 fact:

a piece of information about circumstances that exist or events that have occurreda statement or assertion of verified information about something that is the case or has happenedan event known to have happened or something known to have existeda concept whose truth can be proved

例句：

For eight years she was in fact spying for the enemy.八年来她实际上一直为敌人做间谍工作。