角斗士在竞技场中与狮子搏斗，令欢呼的观众兴奋不已。

The ___gladiator fought a lion in the arena, thrilling the cheering crowd.

在商业竞争中，他就像一位角斗士，从不畏惧任何挑战。

In business competition, he is like a ___gladiator, never afraid of any challenge.