He wrote a story in simple English.
The point I am making is a very simple one.
It should be quite simple; I don't envisage any difficulty.
The book is quite simple to use.
The plan sounds simple enough but it won't be so simple to put it into action.
We use bricks and branches of trees to form a simple shelter.
自然的; 率直的; 天真的
He is a simple and well liked man.
He was as simple as a child.
易受骗的; 迟钝的, 头脑简单的
You may be joking but she's simple enough to believe you.