- it will not do if one merely pays lip service to ...; it is no use just talking
- 空谈: indulge in empty talk
- 无益: unprofitable; useless; no go ...
- 空谈无补: talk of the devil and he will appear; talking mends no holes
- 空谈无济于事: talking mends no holes
- 空谈无补,实验方知: To indulge in empty talk is of no useonly by carrying out experiments that one can learn it.The proof of the pudding is in the eating.
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