Ministry of Education《Dictionary of Chinese Idioms》

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Enter “費” to find 6 Text and 21 Appendix

No.	Idiom Main Point
1	枉費心機主 to toil with no benefit a fruitless attempt
2	費半功倍(事半功倍)
3	枉費心力(枉費心機)
4	枉費心計(枉費心機)
5	枉費心神(枉費心機)
6	得不償費(得不償失)