Formal Comparison Phrases
相比之下 and 相较而言 are formal transitional phrases introducing comparative analysis.
Pattern
相比之下/相较而言, + Comparative Statement
Explanation
相比之下 (by comparison/in contrast) and 相较而言 (comparatively speaking) are formal discourse markers that introduce a comparative perspective. They typically appear at the beginning of a sentence or clause that contrasts with what was previously stated.
These expressions are essential in analytical writing, research papers, and formal presentations. 相比之下 emphasizes contrast between two things already mentioned, while 与...相比 (compared with) explicitly names what is being compared. 相较而言 is slightly more literary and implies a measured, balanced comparison.
Examples
相比之下，第二种方案更具可行性。
Xiāngbǐ zhī xià, dì èr zhǒng fāng'àn gèng jù kěxíng xìng.
By comparison, the second plan is more feasible.
与去年相比，今年的销售额增长了百分之二十。
Yǔ qùnián xiāngbǐ, jīnnián de xiāoshòu é zēngzhǎng le bǎi fēn zhī èrshí.
Compared with last year, this year's sales grew by twenty percent.
相较而言，传统方法更为稳妥。
Xiāngjiào ér yán, chuántǒng fāngfǎ gèng wéi wěntuǒ.
Comparatively speaking, the traditional method is more reliable.
Common Mistakes
相比之下他比她高。
相比之下，他更高一些。
相比之下 already implies comparison; do not redundantly use 比 in the same clause. Also, a comma should follow the phrase.
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