强敌的英文：
heavy metal

参考例句：

He who overcomes his anger subdues his greatest enemy
克制火气就是克制强敌

He had powerful enemies who engineered his ruin.
他策划使他的强敌覆灭。

A powerful enemy,nation,ruler,trade union
强敌、强国、强有力的统治者、有势力的工会.

It is impossible to vanquish so strong an enemy without making an extensive and long-term effort.
现在要战胜这样一个强敌，非有长期的广大的努力是不可能的。

heavy是什么意思：
adj. 沉的；超出一般的；辛苦的；厚的；繁忙的；耗费...的；危险的；沉闷的；严厉的
n. 保镖；苦啤酒

a truck; a heavy duty truck
载重汽车

Light Burdens far heavy
远途无轻担

An elephant has a heavy build.
大象躯体庞大。

They were burdened with heavy taxation.
他们负担重税。

A light purse is a heavy curse
为人无钱处处难

metal是什么意思：
n. 金属；金属制品；气质，勇气；重金属摇滚乐
adj. 金属制的

A hammer has a metal head and a wooden or metal handle.
锤子有个金属的头，一个木质的或金属的把柄。

Metals contract in cold weather.
金属在寒冷的天气里收缩。

The lye will eat through the metal.
碱液会腐蚀金属。

railroad tie of metal
铁路金属枕木

The metal buckled in the great heat.
这金属在高温下变形了。