下决心制定计划用英语怎么说

下决心制定计划用英语可以说成 "make a resolve to set a plan"。

其中 "make a resolve" 意为 "下决心"，"set a plan" 意为 "制定计划"。

英文例句及其中文翻译：

I have made a resolve to set a plan for my future career. (我已经下决心制定一个关于我未来事业的计划了。)
We need to make a resolve to set a plan for our company's growth. (我们需要下决心制定一个关于公司增长的计划。)
She made a resolve to set a plan for her weight loss journey. (她下决心制定一个关于减肥之旅的计划。)