fatal:
adj. 致命的；重大的；毁灭性的；命中注定的
There was a fatal flaw in the plan.
计划中有一个致命的缺陷。
Two of the knife thrusts were fatal.
猛刺的其中两刀是致命的。
Even moderate amounts of the drug can be fatal.
这种药的用量即使不很大也会致命。
fateful:
adj. 重大的；决定性的；宿命的
She looked back now to that fateful day in December.
她现在回顾十二月里那决定性的一天。
He gave a detailed account of what happened on the fateful night.
他对那个决定命运的夜晚所发生的事情做了一个详细的报道。
This step involved many fateful consequences.
这一步骤带来了许多严重的后果。
Then came that fateful night.
然后，那个让我们记忆犹新的夜晚来临了。
