He made great contribution to humankind for his invention of paper-making technique.
蔡伦对人类最大的贡献是发明了纤维纸及其造纸术。
I use a technique you might call "Making the problem harder."
我用了一种或许你会称为“让问题再难一些”的技巧。
The technique of design and making of it is present theoretically and practically.
从理论和实践的角度阐述了设计制造这种换热器的技术。
The technique of design and making of it is present theoretically and practically.
从理论和实践的角度阐述了设计制造这种换热器的技术。
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