简单 (adj.)
1. （不复杂） simple; uncomplicated; plain; simplicity:
simple in structure;
构造简单
simple-minded; seeing things too simply;
头脑简单
2. （平凡, 多用否定式） commonplace; ordinary:
not simple; fairly complicated; remarkable;
不简单
She's marvel to be able to shoot with such accuracy.
她的枪法那么好, 真不简单.
3. （草率; 不细致） oversimplified; casual:
do things in a casual [perfunctory] way;
简单从事
take a naive view; oversimplify a problem;
简单地看问题
简单 n.
simpleness
briefness