(单纯)用英语怎样写

单纯:
1. simple
2. pure
3. alone
4. merely

其它相关解释:
<unsophisticatedness> <simplicity> <simpleness> <simplex> <plain>

例句与用法:
1. 与其说她善良不如说她单纯。
She is not so kind as simple.

2. 幸福并不在于单纯地占有金钱；幸福还在于取得成就后的喜悦，在于创造努力时的激情。
Happiness lies not in the mere possession of money, it lies in the joy of achievement, in the thrill of creative efforts.

3. 教授因他可爱的单纯而上了圈套。
The professor rose to the fly with a charming simplicity.

4. 他乘机利用她的无知和单纯，这种做法是不光明正大的。
He takes advantage of her ignorance and simplicity; it isn't cricket

Innocent单纯的,天真的

pure adj
or
simple adj

whats the object?