不吃用英语怎么说

不吃用英语可以说作 "not eat" 或 "to abstain from eating." 这个词来自英文动词 "abstain," 意思是"抑制，克制，禁止"。例句：
I've decided to abstain from eating meat for health reasons.
She abstained from alcohol during her pregnancy.
Many people abstain from voting in elections because they don't trust the political process.