historic

形容词 historic:

1. belonging to the past; of what is important or famous in the past
   同义词：historical
2. important in history

1. The historic strike gave an enormous impetus to the whole American labor movement.
   这次历史性的罢工对整个美国的劳工运动起了很大的推动作用。
2. The small symbols on this map denote historic places and museums.
   这个地图上的小记号表示史迹兴博物馆。
3. This battle is of historic meaning.
   这一战具有历史意义。

his.tor.ic

adj.（形容词）
Having importance in or influence on history.
在历史上重要的，有历史影响的
Historical.
历史的，历史上的

Historic and historical are differentiated in usage, though their senses overlap.Historic refers to what is important in history:
Historic 和 historical 尽管在意义上有重叠的地方， 但用法上有区别。Historic 指历史上有重要意义的：
例句：
the historic first voyage to outer space.
具有历史意义的首次太空旅行。

It is also used of what is famous or interesting because of its association with persons or events in history:
而且也用于形容那些因与历史事件或人物有联系而有名或有趣的事物：
例句：
a historic house.
故居。

Historicalrefers to whatever existed in the past, whether regarded as important or not:
Historical是指不管重要与否而在过去存在的所有事物：
例句：
a historical character.
历史人物。

Historicalrefers also to anything concerned with history or the study of the past:
Historical也指与历史或对过去的研究有关的事物：
例句：
a historical novel;
历史小说；

例句：
historical discoveries.
历史发现。

The differentiation between the words is not complete.They are often used interchangeably:historic times or historical times.
但这两个词并不是截然不同的。它们经常可换用：historic times 或 historical times