论文的序写得克制而有力,说明了研究的缘起与边界。Lùnwén de xù xiě de kèzhì ér yǒulì, shuōmíng le yánjiū de yuánqǐ yǔ biānjiè.The preface to the thesis is restrained yet powerful, explaining the origin and boundaries of the research.
这本小说由一位著名作家作序。Zhè běn xiǎoshuō yóu yī wèi zhùmíng zuòjiā zuòxù.The preface to this novel was written by a famous writer.
这篇文章的序和跋都出自同一位作者。Zhè piān wénzhāng de xù hé bá dōu chūzì tóng yī wèi zuòzhě.The preface and the afterword of this article come from the same author.