这些障碍物对于想要往上游游动的鱼儿来说是致命的。The barriers are lethal to fish trying to swim upstream.很难判断是谁给了致命的一击。It is impossible to say who struck the fatal blow.这些驱逐行动将给和平进程带来致命的一击。The deportations would be a death blow to the peace proc...

“致命的”的英语可以翻译为：fatal，deadly，[化] lethal，deathful，internecine ...