将以下句子翻译成中文:1.He looked at it with an expression that I have never forgotten—sadness, wonder, regret, perhaps envy.
2.My feeling was that whatever he was thinking of had little to do with this workshop.
3.He rarely spoke, but when he did, it was always with extraordinary precision and often with devastating effect.
4.But to be more original and profound I think you have to be more focused.