改善前后对比英文

before improvingafter improving

before 和 after

可以用more.....than....句型，例如：A is more ....than B.

"the ogiginal(one)" and "the renovated one"或者直接用形容词:original和renovated。整句写法：Contrast between the original one and the renovated one.你要标了"图a"和"图b",则直接说：Contrast between (picture)a and b.

前后对比分析法在战略环境评价中应用初探

Application of before and after comparison methods to strategic environmental assessment

运用微探头超声检查食管下段静脉结构的情况，进行治疗前后对比研究。

Esophageal vascular structures were examined with miniature ultrasonic probe.

成年难治性癫痫患者生活质量手术前后对比分析

Quality of life with the affection of operation in adults with epilepsy