思前想后

Explanation: Thinking: consideration; ago: antecedents; after: consequences. The reason of things happen, the development of the consequences for repeated consideration. 　　Usage: Joint type; as predicate; described ruminating 　　Source: Ming Xu Zhonglin "Gods" 52 back: "see below, and no smell Taishi attack soldiers, led troops and the line slowly; see also folded Yuqing, Xin Wan Injured, Taishi is not fun along the way after thinking . " Thesaurus:  Pakistan, after the former operator, beat one's brains, contemplate, think from different angles, cudgel one's `brains think very hard