英雄无用武之地的英文：
[Literal Meaning]
hero/no/use/ability/aux./place
A hero has no scope for displaying one's abilities.
[解释]
比喻有才能却没有地方或机会施展。
[Explanation]
to have no chance to display one's abilities
[例子]
来到这样一家小公司，他总觉得自己是英雄无用武之地，所以整天想着跳槽。
[Example]
In a small company as such, he felt he has no chance to display his abilities and always thought about change of job.
[英文等价词]
A hero has no chance of using his might.
- "In our school, Professor Johnson was a big fish in a small pond."
"约翰逊教授在我们学校,就像是小池里的大鱼,英雄无用武之地了"