理所当然的形容词用英语怎么说

"obvious" 是表示 "理所当然" 的形容词。

来源： obvious 来自拉丁语 "obvius"，意思是 "显而易见的"。

例句：

It's obvious that he's lying. (很明显他在说谎)
The solution to the problem was obvious. (问题的解决方案很显然)
The cause of the accident was obvious. (事故的原因很明显)