scatterbrained
adj. 注意力不集中的
If you describe someone as scatterbrained, you mean that they often forget things and are unable to organize their thoughts properly.
1. lacking sense or discretion;
2. absent-mindedly irresponsible;
Small and slightly scatterbrained she was in love with the animal world.
虽然她个子矮小,有点丢三落四的,但十分喜爱一切动物.