A Terrible Threat to Mankind的用法和样例：
- The atomic bomb is a grave threat to mankind.
- He would opt to try rescuing his treacherous mate, who might already be dead, rather than pursue Illidan, who was clearly a terrible threat to the entire world.
- A terrible storm forced the ship to put back.
- A nuclear war would be a threat to all mankind.
- A famous thinker once wrote that "the greatest threat to mankind is mankind itself !