C1 very brave or great英勇的,英雄的
a heroic act/deed英勇的行为/英雄事迹
C1 informal If you make a heroic attempt or effort to do something, you try very hard to do it.花费极大力气的
Despite Roz's heroic efforts to liven it up, the party was a disaster.尽管罗兹费了很大力气来活跃气氛,这次聚会还是很糟。