adj.致命的，可致死的，危害极大的，破坏性极大的
n.同“lethal gene”

The poison is lethal in small doses.
这种毒药小剂量即可致死。
The collision was caused by a lethal combination of speed and alcohol.
这次碰撞是由超速和酒精的致命组合造成的。
Pneumonia can be lethal for infants and the elderly.
肺炎对婴幼儿和老年人可能是致命的。
The soldier was taken out by a single, lethal shot.
那名士兵被一发致命的子弹击中身亡。
Malnutrition is a lethal factor contributing to child mortality in this region.
营养不良是该地区儿童死亡率的一个致命因素。
The venom of this snake is not always lethal, but it's best to avoid getting bitten.
这种蛇的毒液并不总是致命的，但最好还是避免被咬。
The new strain of virus has proven to be more lethal than its predecessor.
新病毒株已被证明比其前一代更具致命性。
The heat wave was lethal to many elderly people who didn't have access to air conditioning.
热浪对许多没有空调的老年人来说是致命的。
Detecting cancer early can prevent it from becoming lethal.
早期发现癌症可以防止其变得致命。
The boxer delivered a lethal blow to his opponent's head, ending the match instantly.
拳手向对手头部发出一记致命重击，比赛瞬间结束。