死敌的英文：
avowed enemy
deadly enemy

参考例句：

was engaged in a protracted struggle with a determined enemy.
致力于与死敌的持久战

The two became deadly enemies.
这两人成了死敌。

a lifelong mortal,sworn ] enemy
不共戴天之敌,死敌

He is my deadly enemy.
他是我的死敌。

He is a deadly foe to us.
他是我们的死敌。

Those around him were his favorite councilors, and the bitterest foes of New England
簇拥着他的是他的那些亲信参议员，新英格兰不共戴天的死敌。

He actually made friends with his archenemy, Doune.
他竟同自己的死敌唐恩结成了朋友。

How could someone who seemed so healthy be facing such a deadly enemy?
对于一个看上去那么健康的人来说，该如何面对这样的死敌呢?

Do you Believe these two intimate friends used to Be mutual sworn enemies?
这两位亲密朋友彼此间过去曾经是不共戴天的死敌，你相信吗?

a resting rabbit, with low ATP demands, and a rabbit that sights its mortal enemy, the coyote, and dashes for shelter.
静止的ATP的需求低的兔子，和一只看见了它的死敌山狗的，冲撞着寻找庇护所的兔子。

avowed是什么意思：
v. 声明，承认，招认

He avowed himself a patriot.
他自称自己是爱国者。

The avowed aim of this Government is to reduce taxation.
这届政府所宣称的目标是减少税收.

I must avow that I am innocent.
我要公开声明我是无罪的。

enemy是什么意思：
n. 敌人，仇人；敌军；敌舰；敌国；敌机；大敌；大害
adj. 敌人的，敌方的

charge the enemy
向敌人冲去

The enemy yielded.
敌人投降了。

They surprised the enemy.
他们奇袭了敌人。

deadly是什么意思：
adj. 致命的；冷酷无情的；极富技巧性的；非常的；死一般的；极其无聊的
adv. 非常；如死一般地

I' m in deadly earnest.
我是非常认真的.

She finds these parties deadly.
她觉得这些聚会无聊极了。

Procrastination is a deadly, cyclical virus.
拖拖拉拉是一种循环的致命病毒。