不期然而然

Explanation: Did not think so but even so. 　　Usage: Complex sentence; as predicate, adverbial; do not want that could be so described 　　Source: Ming Gao Qi "Viagra On Love": "function or to have to end in love honest people who work there are increasingly things happen unexpectedly to visit. Why Viagra is indeed!" 　　Examples: We have such a peace of mind, so they all responded to ~. Thesaurus:  By chance Ing, upset, unexpectedly, Out its take at advantage, against expectation, s unpreparedness, The enemy accident