考试成绩不理想用英语怎么说

"Unsatisfactory exam results" 或 "Disappointing exam results" 都是表示考试成绩不理想的常用说法。

"Unsatisfactory" 是形容词，意为 "不能令人满意的"，"Disappointing" 是形容词，意为 "令人失望的"。

例句：

I got an unsatisfactory grade on my math test. 我数学考试成绩不理想。
The exam results were disappointing. 考试成绩令人失望。
My score on the final exam was less than satisfactory. 我的期末考试成绩不够理想。