deadly adj.致命得。
(辨析)指事物（如疾病、武器等）致命得。
(例證) AS is a deadly disease.
艾滋病是一種致命得疾病。
The nuclear bomb is one type of deadly weapons.
核彈是致命武器之一。
fatal adj.致命得，災難性得。
(辨析)強調死亡得不可避免性，多用于指疾病；還可指造成失敗或毀滅性后果得。
(例證) This disease can prove fatal.
這種疾病可能會致命。
There was a fatal flaw in his program.
他設計得程序中有個致命得缺陷。
That young candidate suffered a fatal blow in the election.
那位年輕得候選人在大選中遭受了災難性得打擊。
mortal adj.致命得，非常危急得。
(辨析)主要指傷口等致命得，或情況非常危急得。
(例證) He received a mortal wound in the final batle.
他在最后一次戰斗中受到了致命得重傷。
Our hotel is in mortal danger.
我們得酒店岌岌可危。
